READ THIS MANUAL CAREFULLY!
It contains important safety information.
OWNER’S MANUAL
YFM80RV
w
This ATV should not be ridden by anyone under 12 years of age.
LIT-11626-19-64
5TH-28199-15
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EBU13310
INTRODUCTION
Congratulations on your purchase of the Yamaha YFM80R. It represents the result of many years of
Yamaha experience in the production of fine sporting, touring, and pacesetting racing machines. With
the purchase of this Yamaha, you can now appreciate the high degree of craftsmanship and reliability
that have made Yamaha a leader in these fields.
This manual will provide you with a good basic understanding of the features and operation of this
machine.
This manual includes important safety information. It provides information about special tech-
niques and skills necessary to ride your machine.
It also includes basic maintenance and inspection procedures. If you have any questions regarding the
operation or maintenance of your machine, please consult a Yamaha dealer.
AN IMPORTANT SAFETY MESSAGE:
8 READ THIS MANUAL TOGETHER WITH TIPS FOR THE ATV RIDER CAREFULLY AND COM-
PLETELY BEFORE OPERATING YOUR MACHINE. MAKE SURE YOU UNDERSTAND ALL
INSTRUCTIONS.
8 PAY CLOSE ATTENTION TO THE WARNING AND CAUTION LABELS ON THE MACHINE.
8 NEVER OPERATE AN ATV WITHOUT PROPER TRAINING OR INSTRUCTION. FREE TRAINING
IS AVAILABLE TO ANYONE WHO BUYS A NEW ATV. CALL 1-800-887-2887 FOR MORE INFOR-
MATION.
8 THIS ATV, AND ANY OTHER ATV OVER 70cc, SHOULD NOT BE OPERATED BY A CHILD
UNDER 12 YEARS OF AGE.
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AN IMPORTANT NOTE TO PARENTS:
This ATV is not a toy. Before you let your child ride this ATV, you should understand the instructions
and warnings in this Owner’s Manual. Then be sure your child understands and will follow them.
Children differ in skills, physical abilities and judgment. Some children may not be able to operate an
ATV safely. Parents should supervise their child’s use of the ATV at all times. Parents should permit
continued use only if they determine that the child has the ability to operate the ATV safely.
Your ATV was delivered with an adjustable speed limiter and also with an air intake restrictor plate.
Yamaha recommends that all beginners start off with the speed limiter screw turned in and the air
intake restrictor plate installed to limit the amount of speed available while they learn. The limiter screw
may be gradually turned out to increase maximum speed as the beginner becomes more familiar with
operating the ATV. Parents should decide when to adjust the ATV for more power as their youngster’s
riding skills improve. Once the ATV rider can operate with skill at the top speed permitted by adjusting
the speed limiter alone, the air intake restrictor plate can be removed. Since removal of this plate will
result in a significant increase in power, turn the speed limiter back in again; adjust it out in stages as
you did before.
If your child is a beginner or is inexperienced, he or she should take a training course. See the previ-
ous page for information about the free training available to purchasers of new ATVs.
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EBU00801
IMPORTANT MANUAL INFORMATION
FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN
SERIOUS INJURY OR DEATH.
Particularly important information is distinguished in this manual by the following notations:
The Safety Alert Symbol means ATTENTION! BECOME ALERT!
YOUR SAFETY IS INVOLVED!
Q
Failure to follow WARNING instructions could result in severe injury or
death to the machine operator, a bystander or a person inspecting or
repairing the machine.
w
A CAUTION indicates special precautions that must be taken to avoid
damage to the machine.
cC
NOTE:
A NOTE provides key information to make procedures easier or clearer.
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EBU15000
IMPORTANT NOTICE
This ATV is designed and manufactured for OFF-ROAD use only. It is illegal and unsafe to operate
this ATV on any public street, road or highway.
This ATV complies with all applicable OFF-ROAD noise level and spark arrester laws and regulations
in effect at the time of manufacture.
Please check your local riding laws and regulations before operating this ATV.
EBU13330
YFM80RV
OWNER’S MANUAL
©2005 by Yamaha Motor Corporation, U.S.A.
1st edition, June 2005
All rights reserved.
AFFIX DEALER
LABEL HERE
Any reprinting or unauthorized use
without the written permission
of Yamaha Motor Corporation,
U.S.A.
is expressly prohibited.
Printed in Japan.
P/N LIT-11626-19-64
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EBU00014
w
Indicates a potential hazard that could result
in serious injury or death.
CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS.......................1-1
Speed limiter ........................................4-4
Front brake lever ..................................4-5
Brake pedal and rear brake lever.........4-5
Parking brake .......................................4-6
Shift pedal ............................................4-8
Fuel tank cap........................................4-8
Fuel cock..............................................4-9
Choke lever ........................................4-10
Seat....................................................4-10
1
2
3
SAFETY INFORMATION.........................2-1
DESCRIPTION AND MACHINE
IDENTIFICATION.....................................3-1
Identification number records...............3-2
Key identification number.....................3-2
Vehicle identification number ...............3-3
Model label...........................................3-3
PRE-OPERATION CHECKS....................5-1
Front and rear brakes ...........................5-2
Fuel ......................................................5-3
Engine oil.............................................5-5
Final gear oil.........................................5-5
Throttle lever ........................................5-6
Tires .....................................................5-6
5
CONTROL FUNCTIONS..........................4-1
Main switch...........................................4-1
Indicator lights ......................................4-1
Handlebar switches..............................4-2
Throttle lever ........................................4-3
4
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How to measure tire pressure ..............5-7
Tire wear limit.......................................5-8
Fittings and fasteners...........................5-9
Switches...............................................5-9
Battery..................................................5-9
Be careful where you ride...................7-16
Turning your ATV ...............................7-23
Climbing uphill....................................7-25
Riding downhill ...................................7-30
Crossing a slope.................................7-32
Crossing through shallow water .........7-34
Riding over rough terrain....................7-36
Sliding and skidding ...........................7-38
What to do if .......................................7-40
What to do..........................................7-40
OPERATION............................................6-1
Starting a cold engine...........................6-1
Starting a warm engine ........................6-3
Warming up..........................................6-3
Shifting .................................................6-4
To start out and accelerate...................6-4
To decelerate .......................................6-5
Engine break-in ....................................6-6
Parking .................................................6-7
Parking on a slope................................6-8
Accessories and loading ......................6-9
6
PERIODIC MAINTENANCE AND
8
ADJUSTMENT .........................................8-1
Owner’s manual and tool kit.................8-1
Periodic maintenance chart for the
emission control system.....................8-3
General maintenance and lubrication
chart ...................................................8-4
Engine oil..............................................8-6
Final gear oil.........................................8-8
Spark plug inspection.........................8-10
Air filter cleaning.................................8-11
Riding Your ATV ......................................7-1
Getting to know your ATV.....................7-3
Ride with care and good
7
judgement...........................................7-4
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Air intake restrictor plate removal.......8-14
Spark arrester cleaning ......................8-15
Carburetor adjustment........................8-17
Idle speed adjustment ........................8-17
Valve clearance adjustment ...............8-18
Cam chain adjustment........................8-18
Front and rear brake shoe
Fuse replacement...............................8-30
Troubleshooting..................................8-31
Troubleshooting chart.........................8-32
CLEANING AND STORAGE....................9-1
A. Cleaning ...........................................9-1
B. Storage ............................................9-3
9
inspection .........................................8-18
Front brake lever free play
adjustment........................................8-19
Rear brake lever and pedal
adjustment........................................8-21
Clutch adjustment...............................8-24
Cable inspection and lubrication ........8-25
Brake and shift pedal/brake lever
lubrication.........................................8-25
Knuckle shaft and steering shaft
SPECIFICATIONS .................................10-1
NOISE REGULATION............................11-1
MAINTENANCE RECORD.....................12-1
ATV LIMITED WARRANTY....................13-1
10
11
12
13
14
YAMAHA EXTENDED SERVICE
(Y.E.S.)...................................................14-1
lubrication.........................................8-26
Wheel removal ...................................8-26
Wheel installation ...............................8-26
Battery................................................8-27
Replenishing the battery fluid.............8-29
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EBU00464
LOCATION OF THE WARNING AND
SPECIFICATION LABELS
Read and understand all of the labels on your
machine. They contain important information for
safe and proper operation of your ATV.
1
2
Never remove any labels from your ATV. If a label
becomes difficult to read or comes off, a replace-
ment label is available from your Yamaha dealer.
3
4
1-1
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1
2
1
q
WARNING
q
WARNING
Improper ATV use can result in SEVERE
INJURY or DEATH.
ALWAYS USE
NEVER USE NEVER CARRY NEVER USE
AN APPROVED ON PUBLIC
PASSENGERS WITH DRUGS
OR ALCOHOL
HELMET AND
PROTECTIVE
GEAR
NEVER operate :
ROADS
Operating this ATV if you are under
the age of 12 increases your chance
of severe injury or death.
9
9
without proper training or instruction.
at speeds too fast for your skills or
the conditions.
Adult supervision required for children
9
9
on public roads-a collision can occur
with another vehicle.
under age 16.
NEVER permit children under age 12
with a passenger-passengers affect balance
and steering and increase risk
of losing control.
to operate this ATV.
4EM-21697-31
ALWAYS :
9 use proper riding techniques to avoid
vehicle overturns on hills and rough terrain
and it turns.
9
avoid paved surfaces-pavement may
seriously affect handling and control.
LOCATE AND READ OWNER'S MANUAL.
FOLLOW ALL INSTRUCTIONS AND WARNINGS.
5FE-21568-11
1-2
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3
4
q
q
WARNING
WARNING
IMPROPER TIRE PRESSURE OR OVERLOADING CAN
CAUSE LOSS OF CONTROL.
NEVER ride as a
passenger.
LOSS OF CONTROL CAN RESULT IN SEVERE
INJURY OR DEATH.
OPERATING TIRE PRESSURE: Set with tires cold
kgf/cm2
kgf/cm2
kgf/cm2
kgf/cm2
}
}
}
}
Passengers can cause
{
{
9
Recommended
:
FRONT
:
:
:
:
20 kPa,
0.20
2.9 psi
2.9 psi
2.5 psi
2.5 psi
REAR
20 kPa, 0.20
a loss of control,
9Minimum
{
:
FRONT
REAR
17 kPa, 0.17
resulting in SEVERE
INJURY or DEATH.
{
17 kPa, 0.17
9
Never set tire pressure below minimum.
It could cause the tire to dislodge from the rim.
LOADING
9
5FE-2151H-01
Maximum Vehicle Load : 95 kg, (209 lbs).
Includes weight of operator, cargo and accessories.
4EM-21696-11
1-3
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EBU13390
q SAFETY INFORMATION
2
AN ATV IS NOT A TOY AND CAN BE HAZARDOUS TO OPERATE. An ATV handles differently from
other vehicles including motorcycles and cars. A collision or rollover can occur quickly, even during
routine maneuvers such as turning and riding on hills or over obstacles, if you fail to take proper pre-
cautions.
SEVERE INJURY OR DEATH can result if you do not follow these instructions:
8 Read this manual and all labels carefully and follow the operating procedures described.
8 Never operate an ATV without proper training or instruction. Take a Training Course. Beginners
should receive training from a certified instructor. Contact an authorized ATV dealer or call
1-800-887-2887 to find out about the training courses nearest you.
8 Always follow the age recommendation:
- A child under 12 years old should never operate an ATV with engine size greater than 70cc.
- A child under 16 years old should never operate an ATV with engine size greater than 90cc.
8 Never allow a child under age 16 to operate an ATV without adult supervision, and never allow con-
tinued use of an ATV by a child if he or she does not have the abilities to operate it safely.
8 Never carry a passenger on an ATV.
2-1
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8 Always avoid operating an ATV on any paved surfaces, including sidewalks, driveways, parking lots
and streets.
8 Never operate an ATV on any public street, road or highway, even a dirt or gravel one.
8 Never operate an ATV without wearing an approved motorcycle helmet that fits properly. You
should also wear eye protection (goggles or face shield), gloves, boots, long-sleeved shirt or jacket,
and long pants.
8 Never consume alcohol or drugs before or while operating this ATV.
8 Never operate at speeds too fast for your skills or the conditions. Always go at a speed that is prop-
er for the terrain, visibility and operating conditions, and your experience.
8 Never attempt wheelies, jumps, or other stunts.
8 Always inspect your ATV each time you use it to make sure it is in safe operating condition. Always
follow the inspection and maintenance procedures and schedules described in this manual.
8 Always keep both hands on the handlebars and both feet on the footrests of the ATV during opera-
tion.
8 Always go slowly and be extra careful when operating on unfamiliar terrain. Always be alert to
changing terrain conditions when operating the ATV.
2-2
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8 Never operate on excessively rough, slippery or loose terrain until you have learned and practiced
the skills necessary to control the ATV on such terrain. Always be especially cautious on these
kinds of terrain.
8 Always follow proper procedures for turning as described in this manual. Practice turning at low
speeds before attempting to turn at faster speeds. Do not turn at excessive speed.
8 Never operate the ATV on hills too steep for the ATV or for your abilities. Practice on smaller hills
before attempting larger hills.
8 Always follow proper procedures for climbing hills as described in this manual. Check the terrain
carefully before you start up any hill. Never climb hills with excessively slippery or loose surfaces.
Shift your weight forward. Never open the throttle suddenly or make sudden gear changes. Never
go over the top of a hill at high speed.
8 Always follow proper procedures for going down hills and for braking on hills as described in this
manual. Check the terrain carefully before you start down any hill. Shift your weight backward.
Never go down a hill at high speed. Avoid going down a hill at an angle that would cause the vehicle
to lean sharply to one side. Go straight down the hill where possible.
8 Always follow proper procedures for crossing the side of a hill as described in this manual. Avoid
hills with excessively slippery or loose surfaces. Shift your weight to the uphill side of the ATV.
Never attempt to turn the ATV around on any hill until you have mastered the turning technique
described in this manual on level ground. Avoid crossing the side of a steep hill if possible.
2-3
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8 Always use proper procedures if you stall or roll backwards when climbing a hill. To avoid stalling,
use proper gear and maintain a steady speed when climbing a hill. If you stall or roll backwards, fol-
low the special procedure for braking described in this manual. Dismount on the uphill side or to a
side if pointed straight uphill. Turn the ATV around and remount, following the procedure described
in this manual.
8 Always check for obstacles before operating in a new area.
Never attempt to operate over large obstacles, such as large rocks or fallen trees. Always follow
proper procedures when operating over obstacles as described in this manual.
8 Always be careful when skidding or sliding. Learn to safely control skidding or sliding by practicing
at low speeds and on level, smooth terrain. On extremely slippery surfaces, such as ice, go slowly
and be very cautious in order to reduce the chance of skidding or sliding out of control.
8 Never operate an ATV in fast flowing water or in water deeper than that recommended in this manu-
al. Remember that wet brakes may have reduced stopping ability. Test your brakes after leaving
water. If necessary, apply them several times to let friction dry out the linings.
8 Always use the size and type tires specified in this manual. Always maintain proper tire pressure as
described in this manual.
8 Never modify an ATV through improper installation or use of accessories.
2-4
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8 Never exceed the stated load capacity for an ATV. Cargo should be properly distributed and
securely attached. Reduce speed and follow instructions in this manual for carrying cargo or pulling
a trailer. Allow greater distance for braking.
FOR MORE INFORMATION ABOUT ATV SAFETY, call the Consumer Products Safety Commission
at 1-800-638-2772, or the ATV Distributor’s Safety Hotline at 1-800-852-5344.
2-5
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q
When transporting the ATV in another
vehicle, be sure it is kept upright and that
the fuel cock is in the “OFF” position.
Otherwise, fuel may leak out of the carbu-
retor or fuel tank.
WARNING
POTENTIAL HAZARD
Improper handling of gasoline.
WHAT CAN HAPPEN
Gasoline can catch fire and you could be
burned.
WHAT CAN HAPPEN
Gasoline is poisonous and can cause
injuries.
HOW TO AVOID THE HAZARD
Always turn off the engine when refueling.
Do not refuel right after the engine has
been running and is still very hot.
Do not spill gasoline on the engine or
exhaust pipe/muffler when refueling.
Never refuel while smoking, or while in the
vicinity of sparks, open flames, or other
sources of ignition such as the pilot lights
of water heaters and clothes dryers.
HOW TO AVOID THE HAZARD
If you should swallow some gasoline or
inhale a lot of gasoline vapor, or get some
gasoline in your eyes, see your doctor
immediately.
If gasoline spills on your skin, wash with
soap and water. If gasoline spills on your
clothing, change your clothes.
2-6
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q
WARNING
POTENTIAL HAZARD
Starting or running the engine in a closed
area.
WHAT CAN HAPPEN
Exhaust fumes are poisonous and may
cause loss of consciousness and death
within a short time.
HOW TO AVOID THE HAZARD
Always operate your ATV in an area with
adequate ventilation.
2-7
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EBU00032
DESCRIPTION AND MACHINE IDENTIFICATION
e
t
q
w
u r
o i u
y
1. Spark arrester
2. Seat
10. Rear brake lever
11. Parking brake
!
0
!
1
!
2
3. Front cover
4. Brake pedal
5. Fuel cock
6. Rear wheel
7. Footrest
12. Neutral indicator light
13. Front brake lever
14. Throttle lever
15. Main switch
16. Fuel tank cap
8. Shift pedal
9. Front wheel
17. Handlebar switches
NOTE:
The machine you have purchased may differ
slightly from those shown in the figures of this
manual.
!
6
!
5
!
4
!
7
3-1
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EBU00600
EBU00035
Identification number records
Key identification number
Record the key identification number, vehicle
identification number and model label informa-
tion in the spaces provided for assistance when
ordering spare parts from a Yamaha dealer or
for reference in case the vehicle is stolen.
1. KEY IDENTIFICATION NUMBER:
The key identification number is stamped on the
key as shown in the following illustration. This
number can be used for ordering a new key.
3
q
2. VEHICLE IDENTIFICATION NUMBER:
3. MODEL LABEL INFORMATION:
1. Key identification number
1
6
3-2
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EBU00036
EBU00787
Vehicle identification number
The vehicle identification number is stamped
into the frame.
Model label
The model label is affixed to the location in the
illustration. Record the information on this label
in the space provided. This information will be
needed to order spare parts from your Yamaha
dealer.
1
q
1. Vehicle identification number
NOTE:
1. Model label
The vehicle identification number is used to
identify your machine.
3-3
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EBU00039
EBU00043
Indicator lights
CONTROL FUNCTIONS
w
EBU00603
Indicates a potential hazard that could result
in serious injury or death.
Neutral indicator light “N”
This indicator light comes on when the transmis-
sion is in neutral.
4
EBU00042
Main switch
Functions of the respective switch positions are
as follows:
ON:
The engine can be started only at this position.
OFF:
All electrical circuits are switched off. The key
can be removed in this position.
q
OFF
ON
1. Neutral indicator light “N”
4-1
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EBU00053
EBU00056
Handlebar switches
Start switch “START”
The starter motor cranks the engine when this
switch is pushed.
cC
See starting instructions prior to starting
engine (see page 6-1 for details).
q
w
NOTE:
If the starter switch is pushed with the main
switch “ON” and the engine stop switch “OFF”,
the starter motor will be activated but the engine
will not start. To start the engine, be sure to
position the engine stop switch at “RUN”.
1. Engine stop switch “ENG. STOP”
2. Start switch “START”
EBU11580
Engine stop switch “ENG. STOP”
Make sure that the engine stop switch is in the
“RUN” position before starting the engine. The
engine stop switch controls ignition and can be
used at all times to stop the engine, especially in
an emergency. The engine will not start or run
when the engine stop switch is turned to “OFF”.
4-2
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EBU00062
Throttle lever
Before starting the engine, check the throttle to
be sure it is operating smoothly. Make sure it
returns to the idle position as soon as the lever
is released.
Once the engine is running, movement of the
throttle lever will increase the engine speed.
Regulate the speed of the machine by varying
the throttle position. Because the throttle is
spring-loaded, the machine will decelerate, and
the engine will return to an idle any time the
hand is removed from the throttle lever.
q
WARNING
POTENTIAL HAZARD
Malfunction of throttle.
WHAT CAN HAPPEN
The throttle could be hard to operate, mak-
ing it difficult to speed up or slow down
when you need to. This could cause an
accident.
HOW TO AVOID THE HAZARD
Check the operation of the throttle lever
before you start the engine. If it does not
work smoothly, check for the cause.
Correct the problem before riding the ATV.
Consult a Yamaha dealer if you can’t find
or solve the problem yourself.
q
1. Throttle lever
4-3
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EBU15650
removal of this plate will result in a significant
increase in power, turn the speed limiter com-
pletely back in again; adjust it out in stages as
you did before.
Adjusting for maximum throttle lever movement
without removing the air intake restrictor plate
will cause the engine to run roughly at higher
speeds.
Speed limiter
The speed limiter keeps the throttle from fully
opening, even when the throttle lever is pushed
to the maximum. Screwing in the adjuster limits
the maximum engine power available and
decreases the maximum speed of the ATV.
Your ATV was delivered with an adjustable
speed limiter and also with an air intake restric-
tor plate. Yamaha recommends that all begin-
ning riders start off with the speed limiter screw
turned in and the air intake restrictor plate
installed to limit the amount of speed available
while they learn. The limiter screw may be grad-
ually turned out to increase maximum speed as
the beginner becomes more familiar with operat-
ing the ATV. Parents should decide when to
adjust the ATV for more power as their young-
ster’s riding skills improve. Once the ATV rider
can operate with skill at the top speed permitted
by adjusting the speed limiter alone, the air
intake restrictor plate can be removed. Since
For air intake restrictor plate removal instruc-
tions, see page 8-14.
a
q
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1. Locknut
2. Adjuster
a. No more than 20 mm (0.8 in)
4-4
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EBU00070
Front brake lever
q
WARNING
The front brake lever is located on the right han-
dlebar. Pull it toward the handlebar to apply the
front brake.
POTENTIAL HAZARD
Improper adjustment of the speed limiter
and throttle.
WHAT CAN HAPPEN
The throttle cable could be damaged.
Improper throttle operation could result.
You could lose control, have an accident
or be injured.
q
HOW TO AVOID THE HAZARD
Do not turn the speed adjuster out more
than 20 mm (0.8 in).
1. Front brake lever
EBU00732
Brake pedal and rear brake lever
The brake pedal is located on the right side of
the ATV and the rear brake lever is located on
the left handlebar. Push down on the pedal or
pull the lever toward the handlebar to apply the
rear brake.
4-5
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EBU00074
Parking brake
Use the parking brake when you have to start
the engine or park the machine, especially on a
slope. Apply the rear brake lever and push down
the lock plate to apply the parking brake.
Squeeze the rear brake lever to release the
parking brake.
q
q
1. Brake pedal
q
1. Lock plate
1. Rear brake lever
4-6
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q
WARNING
POTENTIAL HAZARD
Improper use of the parking brake.
WHAT CAN HAPPEN
The ATV could start moving unexpectedly
if the parking brake is not applied before
starting the engine. This could cause loss
of control or a collision.
The brake could overheat if you ride the
ATV without releasing the parking brake.
You could lose braking performance
which could cause an accident. You could
also wear out the brakes prematurely.
HOW TO AVOID THE HAZARD
Always set the parking brake before start-
ing the engine.
Always be sure you have released the
parking brake before you begin to ride.
q
1. Locked position
4-7
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EBU00083
EBU00092
Shift pedal
Fuel tank cap
This machine is equipped with a constant-mesh
3-speed transmission. The shift pedal is located
on the left side of the engine. Neutral is at the
bottom position.
Remove the fuel tank cap by turning it counter-
clockwise.
q
3
2
1
N
1. Fuel tank cap
q
1. Shift pedal
N. Neutral position
4-8
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EBU00093
Fuel cock
The fuel cock supplies fuel from the fuel tank to
the carburetor.
The fuel cock has three positions.
OFF: With the lever in this position fuel will not
flow. Always turn the lever to this position
when the engine is not running.
ON: With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
RES: This indicates reserve. If you run out of
fuel while riding, turn the lever to this
position. THEN FILL THE FUEL TANK
AT THE FIRST OPPORTUNITY. After
refuelling, return the fuel cock lever to the
“ON” position.
4-9
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EBU00096
EBU00566
Choke lever
Seat
The choke is used to start a cold engine. Refer
to “Starting a cold engine” for proper operation.
(See page 6-1.)
To remove the seat, pull the seat lock lever
upward and pull up the seat at the rear.
a
q
q
w
e
1. Seat lock lever
a. Choke lever
1. Fully open “ON” 2. Half open (warming up position)
3. Closed “OFF”
4-10
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To install the seat, insert the projection on the
front of the seat into the seat holder and push
down on the seat at the rear.
q
w
1. Projection
2. Seat holder
NOTE:
Make sure that the seat is securely fitted.
4-11
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EBU00112
w
Indicates a potential hazard that could result
in serious injury or death.
4-12
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PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM
ROUTINE
PAGE
5-2–5-3, 8-18–8-23
5-3–5-4
9 Check operation, condition and free play.
9 Adjust if necessary.
Brakes
Fuel
9 Check fuel level.
9 Fill with fuel if necessary.
5
9 Check oil level.
9 Fill with oil if necessary.
5-5, 8-6–8-7
Engine oil
Final gear oil
Throttle
9 Check for leakage.
5-5, 8-8–8-9
9 Check for proper throttle cable operation.
9 Check tire pressure, wear and damage.
9 Check all fittings and fasteners.
9 Check operation.
5-6
5-6–5-8, 8-26
5-9
Wheels and tires
Fittings and fasteners
Switches
5-9
9 Check fluid level.
9 Fill with distilled water if necessary.
Battery
5-9, 8-27–8-29
5-1
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EBU04762
q
WARNING
Front and rear brakes
Brake levers and brake pedal
8 Check for correct free play in the brake levers
and brake pedal. If the free play is incorrect,
adjust it. (See pages 8-19–8-23.)
POTENTIAL HAZARD
Failure to inspect the ATV before operat-
ing.
Failure to properly maintain the ATV.
WHAT CAN HAPPEN
8 Check operation of the brake levers and
brake pedal. They should move smoothly and
there should be a firm feeling when the
brakes are applied. If not, have the ATV
inspected by a Yamaha dealer.
Increases the possibility of an accident or
equipment damage.
HOW TO AVOID THE HAZARD
Always inspect your ATV each time you
use it to make sure the ATV is in safe
operating condition.
Brake operation
Always follow the inspection and mainte-
nance procedures and schedules
described in the Owner’s Manual.
Test the brakes at slow speed after starting out
to make sure they are working properly. If the
brakes do not provide proper braking perfor-
mance, inspect the brake linings for wear. (See
page 8-18–8-19.)
5-2
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EBU13410
Fuel
q
WARNING
Make sure there is sufficient gasoline in the
tank.
POTENTIAL HAZARD
Riding with improperly operating brakes.
WHAT CAN HAPPEN
Recommended fuel:
UNLEADED GASOLINE ONLY
Fuel tank capacity:
You could lose braking ability, which
could lead to an accident.
Total:
6.8 L (1.5 Imp gal, 1.8 US gal)
Reserve:
HOW TO AVOID THE HAZARD
Always check the brakes at the start of
every ride. Do not ride the ATV if you find
any problem with the brakes. If a problem
cannot be corrected by the adjustment
procedures provided in this manual, have
the ATV inspected by a Yamaha dealer.
0.9 L (0.2 Imp gal, 0.2 US gal)
cC
Use only unleaded gasoline. The use of leaded
gasoline will cause severe damage to internal
engine parts, such as the valves and piston
rings, as well as to the exhaust system.
Your Yamaha engine has been designed to use reg-
ular unleaded gasoline with a pump octane number
([R+M]/2) of 86 or higher, or research octane number
of 91 or higher. If knocking or pinging occurs, use a
different brand of gasoline or premium unleaded fuel.
5-3
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Unleaded fuel will give you longer spark plug life
and reduced maintenance cost.
q
WARNING
POTENTIAL HAZARD
Improper care when refueling.
WHAT CAN HAPPEN
Gasohol
There are two types of gasohol; gasohol con-
taining ethanol and that containing methanol.
Gasohol containing ethanol can be used if
ethanol content does not exceed 10%. Gasohol
containing methanol is not recommended by
Yamaha because it may cause fuel system
damage or vehicle performance problems.
Fuel can spill, which can cause a fire and
severe injury.
Fuel expands when it heats up. If the fuel
tank is overfilled, fuel could spill out due
to heat from the engine or the sun.
HOW TO AVOID THE HAZARD
Do not overfill the fuel tank. Be careful not
to spill fuel, especially on the engine or
exhaust pipe. Wipe up any spilled fuel
immediately. Be sure the fuel tank cap is
closed securely.
Do not refuel right after the engine has
been running and is still very hot.
1. Filler tube
2. Fuel level
5-4
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EBU10842
EBU00493
Engine oil
Final gear oil
Make sure the engine oil is at the specified level.
Add oil as necessary. (See page 8-6.)
cC
Make sure the final gear oil is at the specified
level. Add oil as necessary. (See pages 8-8–8-9
for details.)
8 In order to prevent clutch slippage (since
the engine oil also lubricates the clutch),
do not mix any chemical additives. Do not
use oils with a diesel specification of “CD”
or oils of a higher quality than specified. In
addition, do not use oils labeled “ENERGY
CONSERVING II” or higher.
Recommended oil:
SAE80API “GL-4” Hypoid gear oil
If desired, an SAE 80W90 hypoid gear oil may
be used for all conditions.
NOTE:
GL-4 is a quality and additive rating, GL-5 or
8 Make sure that no foreign material enters
the crankcase.
GL-6 rated hypoid gear oils may also be used.
Recommended engine oil type and quantity:
See page 10-2.
5-5
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EBU01083
EBU00157
Throttle lever
Tires
Check to see that the throttle lever operates cor-
rectly. It must open smoothly and spring back to
the idle position when released. Have a Yamaha
dealer repair as necessary for proper operation.
q
WARNING
POTENTIAL HAZARD
Operating this ATV with improper tires, or
with improper or uneven tire pressure.
WHAT CAN HAPPEN
Use of improper tires on this ATV, or oper-
ation of this ATV with improper or uneven
tire pressure, may cause loss of control,
increasing your risk of accident.
HOW TO AVOID THE HAZARD
1. The tires listed below have been
approved by Yamaha Motor Co., Ltd.
for this model. Other tire combinations
are not recommended.
Manufacturer
DUNLOP
Size
Type
KT586
KT587
Front
Rear
AT18 × 7–7
AT18 × 8–7
DUNLOP
5-6
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2. The tires should be set to the recom-
mended pressure:
4. Use no more than the following pres-
sures when seating the tire beads.
Front 230 kPa (2.3 kgf/cm2, 33 psi)
Rear 230 kPa (2.3 kgf/cm2, 33 psi)
Higher pressures may cause the tire to
burst. Inflate the tires very slowly and
carefully. Fast inflation could cause
the tire to burst.
8 Recommended tire pressure
Front 20 kPa (0.20 kgf/cm2, 2.9 psi)
Rear 20 kPa (0.20 kgf/cm2, 2.9 psi)
8 Check and adjust tire pressures when
the tires are cold.
8 Tire pressures must be equal on both
sides.
3. Tire pressure below the minimum
specified could cause the tire to dis-
lodge from the rim under severe riding
conditions. The following are mini-
mums:
EBU00159
How to measure tire pressure
Use the low-pressure tire gauge.
Front 17 kPa (0.17 kgf/cm2, 2.5 psi)
Rear 17 kPa (0.17 kgf/cm2, 2.5 psi)
NOTE:
The low-pressure tire gauge is included as stan-
dard equipment. Make two measurements of the
tire pressure and use the second reading. Dust
or dirt in the gauge could cause the first reading
to be incorrect.
5-7
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EBU00160
Set pressure with tires cold.
Tire wear limit
Set tire pressures to the following specifications:
When the tire groove decreases to 3 mm (0.12 in)
due to wear, replace the tire.
Recommended
Minimum
Maximum
pressure
20 kPa
(0.20 kgf/cm2,
2.9 psi)
17 kPa
(0.17 kgf/cm2,
2.5 psi)
23 kPa
(0.23 kgf/cm2,
3.3 psi)
Front
Rear
20 kPa
(0.20 kgf/cm2,
2.9 psi)
17 kPa
(0.17 kgf/cm2,
2.5 psi)
23 kPa
(0.23 kgf/cm2,
3.3 psi)
a
q
a. Tire wear limit
1. Low-pressure tire gauge
5-8
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EBU11620
Fittings and fasteners
Always check the tightness of chassis fittings
and fasteners before a ride. Take the machine
to a Yamaha dealer or refer to the Service
Manual for correct tightening torque.
EBU11700
Switches
Check the operation of all switches. Have a
Yamaha dealer repair as necessary for proper
operation.
EBU00499
Battery
Check fluid level and fill if necessary. Use only
distilled water if refilling is necessary. (See
pages 8-27–8-29.)
5-9
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EBU00161
EBU00579
Starting a cold engine
OPERATION
q
WARNING
w
Indicates a potential hazard that could result
in serious injury or death.
POTENTIAL HAZARD
Freezing control cables in cold weather.
WHAT CAN HAPPEN
q
WARNING
You could be unable to control the ATV,
which could lead to an accident or colli-
sion.
POTENTIAL HAZARD
Operating ATV without being familiar with
all controls.
HOW TO AVOID THE HAZARD
When riding in cold weather, always make
sure all control cables work smoothly
before you begin riding.
WHAT CAN HAPPEN
Loss of control, which could cause an
accident or injury.
HOW TO AVOID THE HAZARD
1. Set the parking brake.
Read the Owner’s Manual carefully. If
there is a control or function you do not
understand, ask your Yamaha dealer.
2. Turn the fuel cock to “ON”.
3. Turn the main switch to “ON” and the engine
stop switch to “RUN”.
4. Shift the transmission into neutral.
6-1
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Position 2: Warming up position.
Position 3: Cold engine start-
NOTE:
This model is equipped with an ignition circuit
ambient temperature above 25°C
cut-off system.
(80°F) and warm engine start posi-
tion.
The engine can be started under the following
conditions.
a. When the transmission is in neutral. At this
time the neutral indicator light should come
on. If the light does not come on, ask a
Yamaha dealer to inspect it.
b. When the transmission is in gear and the
rear brake lever is applied. However, it is
recommended to shift into neutral before
starting the engine.
AMBIENT TEMP. / CHOKE LEVER POSITION
0°
10°
20°
30°
°C
6
30°
50°
70°
90° °F
q
e
a
e
w
5. Use the choke lever in reference to the fig-
ure:
q
a. Choke lever
1. Fully open “ON” 2. Half open (warming up position)
3. Closed “OFF”
Position 1: Cold engine start-
ambient temperature below 30°C
(90°F).
6-2
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6. Completely close the throttle lever and start
the engine by pushing the start switch.
cC
See the “Engine break-in” section prior to
NOTE:
operating engine for the first time.
If the engine fails to start, release the start
switch, then push it again. Pause a few seconds
before the next attempt. Each cranking should
be as short as possible to preserve battery ener-
gy. Do not crank the engine more than 10 sec-
onds on each attempt.
EBU00181
Starting a warm engine
To start a warm engine, refer to the “Starting a
cold engine” section. The choke lever should not
be used. The throttle should be opened slightly.
7. If the engine is started with the starter
(choke) in position 1, the choke lever
should be returned to position 2 to warm up
the engine. If the engine is started with the
starter (choke) in position 2, keep the
starter (choke) in this position to warm up
the engine.
EBU00184
Warming up
To get maximum engine life, always warm up
the engine before starting off. Never accelerate
hard with a cold engine! To see whether or not
the engine is warm, check if it responds to the
throttle normally with the choke lever turned off.
8. Continue warming up the engine until it idles
smoothly and return the choke lever to posi-
tion 3 before riding.
6-3
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EBU00200
Shifting
cC
This model has a 3-speed forward transmission
with centrifugal automatic clutch. The transmis-
sion allows you to control the amount of power
you have available at a given speed or for start-
ing accelerating, climbing, etc. To shift into neu-
tral, return the throttle lever to its original posi-
tion and repeatedly depress the shift pedal until
it stops.
Do not coast for long periods with the engine
off, and do not tow the machine a long dis-
tance. Even with gears in neutral, the trans-
mission is only properly lubricated when the
engine is running. Inadequate lubrication
may damage the transmission.
EBU00205
To start out and accelerate:
1. Release the throttle lever.
cC
Always close the throttle while shifting
gears. Otherwise, damage to the engine and
drive train may result.
3
2
1
N
2. Shift into first gear and release the shift
pedal.
q
3. Open the throttle gradually.
1. Shift pedal
N. Neutral position
6-4
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EBU00207
To decelerate:
4. Once the machine has attained adequate
speed, release the throttle lever.
5. Shift into second gear and release the shift
pedal.
6. Open the throttle gradually.
7. Follow the same procedure when shifting to
the next higher gear.
When slowing down or stopping, release the throttle
and apply the brakes smoothly and evenly. As you
slow down, shift to a lower gear. Be sure that the
engine has sufficiently slowed before engaging a
lower gear. Improper use of the brakes or shifting
can cause the tires to lose traction, reducing control
and increasing the possibility of an accident.
q
WARNING
q
WARNING
POTENTIAL HAZARD
POTENTIAL HAZARD
Opening the throttle before releasing the
shift pedal.
Engaging a lower gear when the engine
speed is too high.
WHAT CAN HAPPEN
WHAT CAN HAPPEN
The machine could wheelie. This would
increase the chance of an accident,
including overturn.
The wheels could stop rotating. This could
cause loss of control, an accident and
injury. It could also cause engine or drive
train damage.
HOW TO AVOID THE HAZARD
HOW TO AVOID THE HAZARD
Release the shift pedal before opening the
throttle. Open the throttle gradually.
Make sure the engine has sufficiently
slowed before shifting to a lower gear.
6-5
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EBU02092
If any abnormality is noticed during this period,
consult a Yamaha dealer.
Engine break-in
There is never a more important period in the
life of your machine than the period between
zero and 20 hours.
For this reason, we ask that you carefully read
the following material. Because the engine is
brand new, you must not put an excessive load
on it for the first several hours of running. During
the first 20 hours, the various parts in the engine
wear and polish themselves to the correct oper-
ating clearances.
During this period, prolonged full throttle opera-
tion or any condition which might result in exces-
sive engine heating must be avoided. However,
momentary (2-3 seconds maximum) full throttle
operation under load does not harm the engine.
Each full throttle acceleration sequence should
be followed with a substantial rest period for the
engine by cruising at lower r/min so the engine
can rid itself of the temporary build up of heat.
0-10 hours:
Avoid continuous operation above half throttle.
Allow a cooling off period of five to ten minutes
after every hour of operation. Vary the speed of
the machine from time to time. Do not operate it
at one set throttle position.
10-20 hours:
Avoid prolonged operation above 3/4 throttle.
Rev the machine freely through the gears but do
not use full throttle at any time.
After break-in:
Avoid prolonged full throttle operation. Vary
speeds occasionally.
6-6
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EBU02111
Parking
When parking, stop the engine and shift into first
gear. Turn the fuel cock to “OFF” and apply the
parking brake.
q
1. Lock plate
q
1. Locked position
6-7
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EBU12960
Parking on a slope
1. Bring the ATV to a stop by applying the
brakes in low gear.
2. Stop the engine.
q
WARNING
3. With the rear brake lever and pedal
applied, apply the parking brake and slowly
release the brake pedal.
POTENTIAL HAZARD
Parking on a hill or other incline.
WHAT CAN HAPPEN
The ATV could roll out of control, increas-
ing the chance of an accident.
HOW TO AVOID THE HAZARD
Avoid parking on hills or other inclines. If
you must park on an incline, put the ATV
in low gear, apply the parking brake, and
block the front and rear wheels with rocks
or other objects.
Do not park the ATV at all on hills that are
so steep you could not walk up them easi-
ly.
6-8
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EBU00221
Accessories and loading
8 Accessories should be rigidly and securely
mounted. An accessory which can shift posi-
tion or come off while you are riding could
affect your ability to control the ATV.
EBU00222
Accessories
Accessories can affect the handling and control
of your ATV. Keep the following in mind when
considering an accessory or operating an ATV
which has accessories.
8 Choose only accessories designed for your
ATV. Your Yamaha dealer has a variety of
genuine Yamaha accessories. Other acces-
sories may also be available on the market.
However, it is not possible for Yamaha to test
all non-Yamaha accessories, nor have any
control over the quality or suitability of them.
Choose a genuine Yamaha accessory, or one
that is equivalent in design and quality.
8 Do not mount an accessory where it could
interfere with your ability to control the ATV.
Examples include (but are not limited to) a
heavy or bulky object attached to the handle-
bars which could make steering difficult, an
accessory that limits your ability to move
around on the seat, or one that limits your
view.
8 Use extra caution when riding an ATV with
accessories. The ATV may handle differently
than it does without accessories.
6-9
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EBU00584
8 Tie down cargo securely to the carriers. Make
sure cargo in the trailer cannot move around.
A shifting load can cause an accident.
8 Make sure the load does not interfere with
controls or your ability to see where you are
going.
8 Ride more slowly than you would without a
load. The more weight you carry, the slower
you should go. Although conditions vary, it is
good practice not to exceed 2nd gear when-
ever you are carrying heavier loads or when
towing a trailer.
Loading
As originally equipped, this ATV is not designed
to carry cargo or tow a trailer. If you choose to
add accessories so that you can carry cargo or
tow a trailer, you must use common sense and
good judgment. Keep the following points in
mind:
8 Never exceed the weight limits shown. An
overloaded ATV can be unstable.
MAXIMUM LOADING LIMIT
Vehicle loading limit (total weight of
cargo, rider and accessories):
95 kg (209 lb)
8 Allow more braking distance. A heavier vehi-
cle takes longer to stop.
8 Avoid making sharp turns unless at very slow
speeds.
8 Load cargo on the carriers as close to the
center of the vehicle as possible. Put cargo at
the rear of the front carrier and at the front of
the rear carrier. Center the load from side to
side.
8 Avoid hills and rough terrain. Choose terrain
carefully. Added weight affects the stability
and handling of the ATV.
6-10
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q
WARNING
POTENTIAL HAZARD
Overloading this ATV or carrying or tow-
ing cargo improperly.
WHAT CAN HAPPEN
Could cause changes in vehicle handling
which could lead to an accident.
HOW TO AVOID THE HAZARD
Never exceed the stated load capacity for
this ATV.
Cargo should be properly distributed and
securely attached.
Reduce speed when carrying cargo or
pulling a trailer. Allow greater distance for
braking.
6-11
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EBU13541
w
Indicates a potential hazard that could result
in serious injury or death.
6-13
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OK
Riding
7
Your
ATV
OK
7-1
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w
Indicates a potential hazard that could result
in serious injury or death.
GETTING TO KNOW YOUR ATV
completely and understand the operation of the
controls. Pay particular attention to the safety
information on pages 2-1–2-7. Please also read
all caution and warning labels on your ATV.
This ATV is for recreation use. This section,
Riding your ATV, provides general ATV riding
instructions for recreational riding. The skills and
techniques described in this section, however,
are appropriate for all types of riding. Riding
your ATV requires special skills acquired
through practice over a period of time. Take the
time to learn the basic techniques well before
attempting more difficult maneuvers.
Riding your new ATV can be a very enjoyable
activity, providing you with hours of pleasure.
But it is essential to familiarize yourself with the
operation of the ATV to achieve the skill neces-
sary to enjoy riding safely. Before you begin to
ride, be sure you have read this Owner’s Manual
7-3
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RIDE WITH CARE AND GOOD JUDGEMENT
HOW TO AVOID THE HAZARD
Beginning and inexperienced operators
should complete the certified training
course offered by Yamaha. They should
then regularly practice the skills learned in
the course and the operating techniques
described in this Owner’s Manual.
For more information about the training
course, contact an authorized ATV dealer
or call 1-800-887-2887.
Get training if you are inexperienced.
Beginners should get training from a certified
instructor.
Become familiar with this ATV at slow speeds
first, even if you are an experienced operator.
Do not attempt to operate at maximum perfor-
mance until you are totally familiar with the
ATV’s handling and performance characteristics.
q
WARNING
Riding your ATV requires skills acquired
through practice over a period of time.
Take the time to learn the basic techniques well
before attempting more difficult maneuvers.
POTENTIAL HAZARD
Operating this ATV without proper instruc-
tion.
WHAT CAN HAPPEN
The risk of an accident is greatly
increased if the operator does not know
how to operate the ATV properly in differ-
ent situations and on different types of ter-
rain.
7-4
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Not recommended for children under 12
years of age.
q
WARNING
POTENTIAL HAZARD
Failure to follow the age recommendations
for this ATV.
WHAT CAN HAPPEN
Use by children of ATVs that are not rec-
ommended for their age can lead to severe
injury or death of the child.
HOW TO AVOID THE HAZARD
A child under 12 should never operate an
ATV with engine size greater than 70cc.
7-5
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This ATV is designed to carry operator only -
passengers prohibited.
q
WARNING
POTENTIAL HAZARD
Carrying a passenger on this ATV.
WHAT CAN HAPPEN
Greatly reduces your ability to balance
and control this ATV. Could cause an acci-
dent, resulting in harm to you and/or your
passenger.
HOW TO AVOID THE HAZARD
Never carry a passenger. The long seat is
to allow the operator to shift position as
needed during operation. It is not for car-
rying passengers.
7-6
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Apparel
Operating without protective clothing
increases your chances of severe injury in
the event of an accident.
q
WARNING
POTENTIAL HAZARD
HOW TO AVOID THE HAZARD
Operating this ATV without wearing an
approved motorcycle helmet, eye protec-
tion and protective clothing.
Always wear an approved motorcycle hel-
met that fits properly.
You should also wear:
eye protection
WHAT CAN HAPPEN
Operating without an
approved motorcycle
helmet
(goggles or face shield)
gloves
boots
long-sleeved shirt or jacket
long pants.
increases Protective
Goggles
clothing
your chances of a
severe head injury or
death in the event of
an accident.
Operating without
eye protection can
result in an accident
and increases your
chances of a severe
injury in the event of
an accident.
Helmet
Gloves
Boots
7-7
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Do not operate after consuming alcohol or
drugs.
q
WARNING
POTENTIAL HAZARD
Operator’s performance capability is reduced by
the influence of alcohol or drugs.
Operating this ATV after consuming alco-
hol or drugs.
WHAT CAN HAPPEN
Could seriously affect your judgment.
Could cause you to react more slowly.
Could affect your balance and perception.
Could result in an accident.
HOW TO AVOID THE HAZARD
Never consume alcohol or drugs before or
while driving this ATV.
7-8
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Pre-operation checks
q
WARNING
Always perform the pre-operation checks listed
on page 5-1 before riding for safety and proper
care of the ATV.
POTENTIAL HAZARD
Operating this ATV with improper tires, or
with improper or uneven tire pressure.
WHAT CAN HAPPEN
q
WARNING
Use of improper tires on this ATV, or oper-
ation of this ATV with improper or uneven
tire pressure, may cause loss of control,
increasing your risk of an accident.
POTENTIAL HAZARD
Failure to inspect the ATV before operat-
ing.
Failure to properly maintain the ATV.
HOW TO AVOID THE HAZARD
WHAT CAN HAPPEN
Always use the size and type tires speci-
fied in the Owner’s Manual for this vehicle
on pages 5-6–5-7.
Increases the possibility of an accident or
equipment damage.
HOW TO AVOID THE HAZARD
Always maintain proper tire pressure as
described in the Owner’s Manual on page
5-8.
Always inspect your ATV each time you
use it to make sure the ATV is in safe
operating condition. Always follow the
inspection and maintenance procedures
and schedules described in the Owner’s
Manual.
7-9
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Speed limiter
w
For riders inexperienced with this model, this
model is equipped with a speed limiter in the throt-
tle lever housing. The speed limiter limits the
power and top speed of the ATV. Turning the
screw in decreases top speed, and turning it out
increases top speed. This model also has an
intake restrictor plate to limit the amount of engine
power available.
Indicates a potential hazard that could result
in serious injury or death.
Do not operate at speeds too fast for your
skills or the conditions.
q
WARNING
Yamaha recommends that all beginning riders
start off with the speed limiter turned in and the air
intake restrictor plate installed to limit the amount
of speed available while they learn. The limiter may
be gradually adjusted to increase maximum speed
as the beginner becomes more familiar with oper-
ating the ATV. Parents should decide when to
adjust the ATV for more power as their youngster’s
riding skills improve. Once the ATV rider can oper-
ate with skill at the top speed permitted by adjust-
ing the speed limiter alone, the air intake restrictor
plate can be removed. Since removal of this plate
will result in a significant increase in power, turn
the speed limiter back in again; adjust it out in
stages as you did before.
POTENTIAL HAZARD
Operating this ATV at speeds too fast for
your skills or the conditions.
WHAT CAN HAPPEN
Increases your chances of losing control
of the ATV, which can result in an acci-
dent.
HOW TO AVOID THE HAZARD
Always go at a speed that is proper for the
terrain, visibility and operating conditions,
and your experience.
7-10
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Adjusting for maximum throttle lever movement
without removing the air intake restrictor plate
will cause the engine to run roughly at higher
speeds.
For air intake restrictor plate removal instruc-
tions, see page 8-14.
MAXIMUM LOADING LIMIT
Vehicle loading limit(total weight of
cargo, rider and accessories):
95 kg (209 lb)
q
WARNING
POTENTIAL HAZARD
Overloading this ATV or carrying or tow-
ing cargo improperly.
WHAT CAN HAPPEN
Could cause changes in vehicle handling
which could lead to an accident.
HOW TO AVOID THE HAZARD
q
w
Never exceed the stated load capacity for this
ATV.
1. Locknut
2. Adjuster
Cargo should be properly distributed and
securely attached.
Loading and accessories
Reduce speed when carrying cargo or pulling
a trailer. Allow greater distance for braking.
Always follow the instructions in your
Owner’s Manual for carrying cargo or pulling
a trailer.
Use extra caution when riding the ATV with addi-
tional loads, such as accessories or cargo. The
ATV’s handling may be adversely affected.
Reduce your speed when adding additional loads.
7-11
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During operation
q
WARNING
Always keep your feet on the footboards during
operation. Otherwise your feet may contact the
rear wheels.
POTENTIAL HAZARD
Removing hands from handlebars or feet
from footboards during operation.
WHAT CAN HAPPEN
Removing even one hand or foot can
reduce your ability to control the ATV or
could cause you to lose your balance and
fall off of the ATV. If you remove a foot
from a footboard, your foot or leg may
come into contact with the rear wheels,
which could injure you or cause an acci-
dent.
HOW TO AVOID THE HAZARD
Always keep both hands on the handle-
bars and both feet on the footboards of
your ATV during operation.
7-12
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Avoid wheelies and jumping. You may lose con-
trol of the ATV or overturn.
q
WARNING
POTENTIAL HAZARD
Attempting wheelies, jumps, and other
stunts.
WHAT CAN HAPPEN
Increases the chance of an accident,
including an overturn.
HOW TO AVOID THE HAZARD
Never attempt stunts, such as wheelies or
jumps. Don’t try to show off.
7-13
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Modifications
q
WARNING
POTENTIAL HAZARD
Operating this ATV with improper modifi-
cations.
WHAT CAN HAPPEN
Improper installation of accessories or
modification of this vehicle may cause
changes in handling which in some situa-
tions could lead to an accident.
HOW TO AVOID THE HAZARD
Never modify this ATV through improper
installation or use of accessories. All parts
and accessories added to this vehicle
should be genuine Yamaha or equivalent
components designed for use on this ATV
and should be installed and used accord-
ing to instructions. If you have questions,
consult an authorized ATV dealer.
7-14
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Exhaust system
HOW TO AVOID THE HAZARD
The exhaust system on the ATV is very hot dur-
ing and following operation. To prevent burns,
avoid touching the exhaust system. Park the
ATV in a place where pedestrians or children
are not likely to touch it.
Do not operate, idle, or park the ATV in dry
grass or other dry ground cover.
Keep the engine area free of dry grass,
brush, or other combustible material. Do
not touch the hot exhaust system. Do not
park the ATV in a place where others might
be likely to touch it.
q
WARNING
POTENTIAL HAZARD
Hot exhaust system.
WHAT CAN HAPPEN
Dry grass or brush or other combustible
material accumulated around the engine
area could catch fire. Someone touching
the exhaust system during or after opera-
tion could be burned.
7-15
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BE CAREFUL WHERE YOU RIDE
This ATV is designed for off-road use only.
Riding on paved surfaces can cause loss of con-
trol.
q
WARNING
POTENTIAL HAZARD
Operating this ATV on paved surfaces.
WHAT CAN HAPPEN
ATVs are designed for off-road use only.
Paved surfaces may seriously affect han-
dling and control of the ATV, and may
cause the vehicle to go out of control.
HOW TO AVOID THE HAZARD
Always avoid paved surfaces, including
sidewalks, driveways, parking lots and
streets.
7-16
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Do not ride on any public road, street, or high-
way. Riding on public roads can result in colli-
sions with other vehicles.
q
WARNING
POTENTIAL HAZARD
Operating this ATV on public streets,
roads or highways.
WHAT CAN HAPPEN
You can collide with another vehicle.
HOW TO AVOID THE HAZARD
Never operate this ATV on any public
street, road or highway, even a dirt or
gravel one.
In many states it is illegal to operate ATVs
on public streets, roads and highways.
7-17
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Know the terrain where you ride. Ride cautiously
in unfamiliar areas. Stay alert for holes, rocks,
or roots in the terrain, and other hidden haz-
ards which may cause the ATV to upset.
q
WARNING
POTENTIAL HAZARD
Failure to use extra care when operating
this ATV on unfamiliar terrain.
WHAT CAN HAPPEN
You can come upon hidden rocks, bumps,
or holes, without enough time to react.
Could result in the ATV overturning or
going out of control.
HOW TO AVOID THE HAZARD
Go slowly and be extra careful when oper-
ating on unfamiliar terrain.
Always be alert to changing terrain condi-
tions when operating the ATV.
7-18
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q
WARNING
POTENTIAL HAZARD
Failure to use extra care when operating
on excessively rough, slippery or loose
terrain.
WHAT CAN HAPPEN
Could cause loss of traction or vehicle
control, which could result in an accident,
including an overturn.
HOW TO AVOID THE HAZARD
Do not operate on excessively rough, slip-
pery or loose terrain until you have
learned and practiced the skills necessary
to control the ATV on such terrain. Always
be especially cautious on these kinds of
terrain.
7-19
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When riding in an area where you might not
easily be seen, such as desert terrain, mount a
caution flag on the ATV. DO NOT use the flag
pole bracket as a trailer hitch.
WHAT CAN HAPPEN
You could be in a collision. You could be
injured.
HOW TO AVOID THE HAZARD
Always mount a caution flag on the ATV to
make you more visible. Watch carefully for
other vehicles.
Do not ride in areas posted “no trespassing”. Do
not ride on private property without getting per-
mission.
q
WARNING
POTENTIAL HAZARD
Operating in areas where you might not be
seen by other off-road vehicles.
7-20
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Select a large, flat area off-road to become
familiar with your ATV. Make sure that this area
is free of obstacles and other riders. You should
practice control of the throttle, brakes, shifting
procedures, and turning techniques in this area
before trying more difficult terrain. Always avoid
riding on paved surfaces: the ATV is designed
for off-road use only, and handling maneuvers
are more difficult to perform on pavement.
With the engine idling, lift the shift pedal to the
1st gear position and then release the parking
brake. Apply the throttle slowly and smoothly.
The centrifugal clutch will engage and you will
start to accelerate. Once the ATV has attained
adequate speed, release the throttle and lift the
shift pedal to the 2nd gear position. Release the
shift pedal and apply the throttle smoothly. Use
this same procedure as you move into the high-
er gears. Be sure to coordinate the use of the
throttle and shift pedal properly. If the throttle is
applied too abruptly or if the throttle is not
released during shifting, or if the shift pedal is
not released before applying the throttle, the
front wheels may lift off the ground resulting in a
loss of directional control. Avoid higher speeds
until you are thoroughly familiar with the opera-
tion of your ATV.
Set the parking brake and follow the instruction
on page 6-1 to start the engine. Once it has
warmed up you are ready to begin riding your
ATV. As you get on the ATV, be sure not to
accidentally move the shift pedal. Remember
that the engine and exhaust pipe will be hot
when riding and afterwards; do not allow skin or
clothing to come in contact with these compo-
nents.
7-21
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cC
q
WARNING
Do not shift gears without releasing the
throttle. Damage to the engine or drive train
may occur.
POTENTIAL HAZARD
Engaging a lower gear when the engine
speed is too high.
WHAT CAN HAPPEN
When slowing down or stopping, release the
throttle and apply the brakes smoothly and
evenly. As you slow down, shift to a lower gear.
Be sure that the engine has sufficiently slowed
before engaging a lower gear. Improper use of
the brakes or shifting can cause the tires to lose
traction, reducing control and increasing the
possibility of an accident.
The wheels could stop rotating. This could
cause loss of control, an accident and
injury. It could also cause engine or drive
train damage.
HOW TO AVOID THE HAZARD
Make sure the engine has sufficiently
slowed before shifting to a lower gear.
7-22
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TURNING YOUR ATV
HOW TO AVOID THE HAZARD
To achieve maximum traction while riding off-
road, the two rear wheels are mounted solidly
on one axle and turn together at the same
speed. Therefore, unless the wheel on the
inside of the turn is allowed to slip or lose some
traction, the ATV will resist turning. A special
turning technique must be used to allow the ATV
to make turns quickly and easily. It is essential
that this skill be learned first at low speed.
Always follow proper procedures for turn-
ing as described in this Owner’s Manual.
Practice turning at low speeds before
attempting to turn at faster speeds. Do not
turn at speeds too fast for your skills or
the conditions.
As you approach a curve, slow down and begin
to turn the handlebars in the desired direction.
As you do so, put your weight on the footboard
to the outside of the turn (opposite your desired
direction) and lean your upper body into the
turn. Use the throttle to maintain an even speed
through the turn. This maneuver will let the
wheel on the inside of the turn slip slightly,
allowing the ATV to make the turn properly.
q
WARNING
POTENTIAL HAZARD
Turning improperly.
WHAT CAN HAPPEN
The ATV could go out of control, causing
a collision or overturn.
7-23
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Once you have learned this technique you
should be able to perform it at higher speeds or
in tighter curves.
Lean towards
inside of turn
Support your
weight on the
outer footrest
Improper riding procedures such as abrupt throt-
tle changes, excessive braking, incorrect body
movements, or too much speed for the sharp-
ness of the turn may cause the ATV to tip. If the
ATV begins to tip over to the outside while nego-
tiating a turn, lean more to the inside. It may
also be necessary to gradually let off on the
throttle and steer to the outside of the turn to
avoid tipping over.
This procedure should be practiced at slow
speed many times in a large off-road area with
no obstacles. If an incorrect technique is used,
your ATV may continue to go straight. If the ATV
doesn’t turn, come to a stop and then practice
the procedure again. If the riding surface is slip-
pery or loose, it may help to position more of
your weight over the front wheels by moving for-
ward on the seat.
Remember: Avoid higher speeds until you are
thoroughly familiar with the operation of your
ATV.
7-24
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CLIMBING UPHILL
HOW TO AVOID THE HAZARD
Use proper riding techniques to avoid vehicle
overturns on hills. Be sure that you can maneu-
ver your ATV well on flat ground before attempt-
ing any incline and then practice riding first on
gentle slopes. Try more difficult climbs only after
you have developed your skill. In all cases avoid
inclines with slippery or loose surfaces, or obsta-
cles that might cause you to lose control.
Never operate the ATV on hills too steep
for the ATV or for your abilities.
Practice on smaller hills before attempting
large hills.
It is important when climbing a hill to make sure
that your weight is transferred forward on the
ATV. This can be accomplished by leaning for-
ward and, on steeper inclines, standing on the
footboards and leaning forward over the handle-
bars.
q
WARNING
POTENTIAL HAZARD
Operating on excessively steep hills.
WHAT CAN HAPPEN
The vehicle can overturn more easily on
extremely steep hills than on level sur-
faces or small hills.
7-25
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q
Never go over the top of any hill at high
speed. An obstacle, a sharp drop, or
another vehicle or person could be on the
other side of the hill.
WARNING
POTENTIAL HAZARD
Climbing hills improperly.
WHAT CAN HAPPEN
Could cause loss of control or cause the
ATV to overturn.
OK
HOW TO AVOID THE HAZARD
Always follow proper procedures for
climbing hills as described in this Owner’s
Manual.
Always check the terrain carefully before
you start up any hill.
Never climb hills with excessively slippery
or loose surfaces.
Shift your weight forward.
Never open the throttle suddenly or make
sudden gear changes. The ATV could flip
over backwards.
7-26
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If you are climbing a hill and you find that you
have not properly judged your ability to make it
to the top, you should turn the ATV around while
you still have forward motion (provided you have
the room to do so) and go down the hill.
When crossing the side of a hill:
Always follow proper procedures as
described in the Owner’s Manual.
Avoid hills with excessively slippery or
loose surfaces.
Shift your weight to the uphill side of the
ATV.
q
WARNING
POTENTIAL HAZARD
Improperly crossing hills or turning on
hills.
OK
WHAT CAN HAPPEN
Could cause loss of control or cause the
ATV to overturn.
HOW TO AVOID THE HAZARD
Never attempt to turn the ATV around on
any hill until you have mastered the turn-
ing technique as described in the Owner’s
Manual on level ground. Be very careful
when turning on any hill.
Avoid crossing the side of a steep hill if
possible.
7-27
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If your ATV has stalled or stopped and you
believe you can continue up the hill, restart care-
fully to make sure you do not lift the front wheels
which could cause you to lose control. If you are
unable to continue up the hill, dismount the ATV
on the uphill side. Physically turn the ATV
around and then descend the hill.
q
WARNING
POTENTIAL HAZARD
Stalling, rolling backwards or improperly
dismounting while climbing a hill.
WHAT CAN HAPPEN
Could result in the ATV overturning.
HOW TO AVOID THE HAZARD
If you start to roll backwards, DO NOT use the
rear brake to stop or try to put the ATV in gear.
The ATV could easily tip over backwards.
Instead, apply the front brake gradually, or dis-
mount the ATV immediately on the uphill side.
Use proper gear and maintain steady
speed when climbing a hill.
If you lose all forward speed:
Keep weight uphill.
Apply the brakes.
Lock the parking brake, after you are
stopped.
If you begin rolling backwards:
Keep weight uphill.
Never apply the rear brake while rolling
backwards. Apply the front brake.
7-28
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When fully stopped, apply the rear
brake as well, and then lock the parking
brake.
Dismount on uphill side or to a side if
pointed straight uphill. Turn the ATV
around and remount, following the proce-
dure described in the Owner’s Manual.
7-29
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RIDING DOWNHILL
q
WARNING
When riding your ATV downhill, shift your weight
as far to the rear and uphill side of the ATV as
possible. Move back on the seat and sit with
your arms straight. Choose a low gear which will
allow the engine compression to do most of the
braking for you. Improper braking may cause a
loss of traction.
Use caution while descending a hill with loose or
slippery surfaces. Braking ability and traction
may be adversely affected by these surfaces.
Improper braking may also cause a loss of trac-
tion.
POTENTIAL HAZARD
Going down a hill improperly.
WHAT CAN HAPPEN
Could cause loss of control or cause the
ATV to overturn.
HOW TO AVOID THE HAZARD
Always follow proper procedures for
going down hills as described in this
Owner’s Manual. Note: a special technique
is required when braking as you go down
a hill.
Always check the terrain carefully before
you start down any hill.
Shift your weight backward.
Never go down a hill at high speed.
Avoid going down a hill at an angle that
would cause the vehicle to lean sharply to
one side. Go straight down the hill where
possible.
Whenever possible, ride your ATV straight
downhill. Avoid sharp angles which could allow
the ATV to tip or roll over. Carefully choose your
path and ride no faster than you will be able to
react to obstacles which may appear.
7-30
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OK
7-31
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CROSSING A SLOPE
q
WARNING
Traversing a sloping surface on your ATV
requires you to properly position your weight to
maintain proper balance. Be sure that you have
learned the basic riding skills on flat ground
before attempting to cross a sloping surface.
Avoid slopes with slippery surfaces or rough ter-
rain that may upset your balance.
POTENTIAL HAZARD
Improperly crossing hills or turning on
hills.
WHAT CAN HAPPEN
Could cause loss of control or cause the
ATV to overturn.
HOW TO AVOID THE HAZARD
As you travel across a slope, lean your body in
the uphill direction. It may be necessary to cor-
rect the steering when riding on loose surfaces
by pointing the front wheels slightly uphill. When
riding on slopes be sure not to make sharp turns
either up or down hill.
Never attempt to turn the ATV around on
any hill until you have mastered the turn-
ing technique as described in the Owner’s
Manual on level ground. Be very careful
when turning on any hill. Avoid crossing
the side of a steep hill if possible.
When crossing the side of a hill:
If your ATV does begin to tip over, gradually
steer in the downhill direction if there are no
obstacles in your path. As you regain proper bal-
ance, gradually steer again in the direction you
wish to travel.
Always follow proper procedures as
described in the Owner’s Manual.
Avoid hills with excessively slippery or
loose surfaces.
7-32
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Shift your weight to the uphill side of the
ATV.
OK
7-33
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CROSSING THROUGH SHALLOW WATER
The ATV can be used to cross slow moving,
shallow water of up to a maximum of 20 cm (7.9
inches) in depth. Before entering the water,
choose your path carefully. Enter where there is
no sharp drop off, and avoid rocks or other
obstacles which may be slippery or upset the
ATV. Drive slowly and carefully.
Remember that wet brakes may have
reduced stopping ability. Test your brakes
after leaving water. If necessary, apply
them several times to let friction dry out
the linings.
q
WARNING
POTENTIAL HAZARD
Operating this ATV through deep or fast
flowing water.
WHAT CAN HAPPEN
Tires may float, causing loss of traction
and loss of control, which could lead to an
accident.
HOW TO AVOID THE HAZARD
Never operate this ATV in fast flowing
water or in water deeper than that speci-
fied in your Owner’s Manual.
7-34
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Test your brakes after leaving the water. Do not
continue to ride your ATV without verifying that
you have regained proper braking ability.
cC
After riding your ATV in water, be sure to
drain the trapped water by removing the
check hose at the bottom of the air filter
case. Wash the ATV in fresh water if it has
been operated in salt water or muddy condi-
tions.
q
1. Check hose
7-35
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RIDING OVER ROUGH TERRAIN
q
WARNING
Riding over rough terrain should be done with
caution. Look out for obstacles which could
cause damage to the ATV or could lead to an
upset or accident. Be sure to keep your feet
firmly mounted on the footboards at all times.
Avoid jumping the ATV as loss of control and
damage to the ATV may result.
POTENTIAL HAZARD
Improperly operating over obstacles.
WHAT CAN HAPPEN
Could cause loss of control or a collision.
Could cause the ATV to overturn.
HOW TO AVOID THE HAZARD
Before operating in a new area, check for
obstacles.
Never attempt to ride over large obstacles,
such as large rocks or fallen trees. When
you go over obstacles, always follow
proper procedures as described in the
Owner’s Manual.
7-36
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SLIDING AND SKIDDING
If the rear wheels of your ATV start to slide side-
ways, control can usually be regained (if there is
room to do so) by steering in the direction of the
slide. Applying the brakes or accelerating is not
recommended until you have corrected the
slide.
Care should be used when riding on loose or
slippery surfaces since the ATV may slide. If
unexpected and uncorrected, sliding could lead
to an accident.
To reduce the tendency for the front wheels to
slide in loose or slippery conditions, positioning
your weight over the front wheels will sometimes
help.
7-38
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With practice, over a period of time, skill at con-
trolled sliding can be developed. The terrain
should be chosen carefully before attempting
such maneuvers, since both stability and control
are reduced. Bear in mind that sliding maneu-
vers should always be avoided on extremely
slippery surfaces such as ice, since all control
may be lost.
q
WARNING
POTENTIAL HAZARD
Skidding or sliding improperly.
WHAT CAN HAPPEN
You may lose control of this ATV. You
may also regain traction unexpectedly,
which may cause the ATV to overturn.
HOW TO AVOID THE HAZARD
Learn to safely control skidding or sliding
by practicing at low speeds and on level,
smooth terrain.
On extremely slippery surfaces, such as
ice, go slowly and be very cautious in
order to reduce the chance of skidding or
sliding out of control.
7-39
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WHAT TO DO IF ...
8 If your ATV starts to slide sideways:
Steer in the direction of the slide if you have
the room.
This section is designed to be a reference guide
only. Be sure to read each section on riding
techniques completely.
Applying the brakes or accelerating is not rec-
ommended until you have corrected the slide.
(See pages 7-38–7-39.)
WHAT TO DO ...
8 If your ATV doesn’t turn when you want it to:
Bring the ATV to a stop and practice the turn-
ing maneuvers again. Be sure you are putting
your weight on the footboard to the outside of
the turn. Position your weight over the front
wheels for better control. (See pages 7-23–
7-24.)
8 If your ATV begins to tip while turning:
Lean more into the turn to regain balance. If
necessary, gradually let off the throttle and/or
steer to the outside of the turn. (See pages
7-23–7-24.)
8 If your ATV can’t make it up a hill you are try-
ing to climb:
Turn the ATV around if you still have forward
speed. If not, stop, dismount on the uphill side
of the ATV and physically turn the ATV
around. If the ATV starts to slip backwards
DO NOT USE THE REAR BRAKE - the ATV
may tip over on top of you. Instead, apply the
front brake or dismount the ATV on the uphill
side. (See pages 7-25–7-29.)
7-40
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8 If your ATV is traversing a sloping surface:
Be sure to ride with your weight positioned
towards the uphill side of the ATV to maintain
proper balance. If the ATV starts to tip, steer
down the hill (if there are no obstacles in your
way) to regain balance. If you discover that
the ATV is going to tip over, dismount on the
uphill side. (See pages 7-32–7-33.)
8 If your ATV encounters shallow water:
Ride slowly and carefully through slow mov-
ing water, watching for obstacles. Be sure to
let water drain from the ATV and CHECK
YOUR BRAKES FOR PROPER OPERATION
when you come out of the water. Do not con-
tinue to ride your ATV until you have regained
adequate braking ability. (See pages 7-34–
7-35.)
w
Indicates a potential hazard that could result
in serious injury or death.
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EBU00515
HOW TO AVOID THE HAZARD
PERIODIC
MAINTENANCE AND
ADJUSTMENT
Turn off the engine when performing
maintenance unless otherwise specified.
Have a Yamaha dealer perform service if
you are not familiar with machine service.
Periodic inspection, adjustment and lubrication
will keep your machine in the safest and most
efficient condition possible. Safety is an obliga-
tion of the machine owner. The most important
points of machine inspection, adjustment and
lubrication are explained on the following pages.
EBU01221
Owner’s manual and tool kit
You are recommended to put this owner’s man-
ual and low-pressure tire gauge in the vinyl bag
and always carry them along with the owner’s
tool kit under the seat.
q
WARNING
POTENTIAL HAZARD
e
Servicing an engine while it is running.
WHAT CAN HAPPEN
Moving parts can catch clothing or parts
of the body, causing injury.
q
Electrical components can cause shocks
or can start fires.
w
1. Owner’s manual
3. Owner’s tool kit
2. Low-pressure tire gauge
8-1
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The service information included in this manual
is intended to provide you, the owner, with the
necessary information for completing your own
preventive maintenance and minor repairs. The
tools provided in the owner’s tool kit are suffi-
cient for this purpose, except that a torque
wrench is also necessary to properly tighten
nuts and bolts.
q
WARNING
POTENTIAL HAZARD
Operating this ATV with improper modifi-
cations.
WHAT CAN HAPPEN
Improper installation of accessories or
modification of this vehicle may cause
changes in handling which in some situa-
tions could lead to an accident.
NOTE:
8
If you do not have a torque wrench available
during a service operation requiring one, take
your machine to a Yamaha dealer to check the
torque settings and adjust them as necessary.
HOW TO AVOID THE HAZARD
Never modify this ATV through improper
installation or use of accessories. All parts
and accessories added to this vehicle
should be genuine Yamaha or equivalent
components designed for use on this ATV
and should be installed and used accord-
ing to instructions. If you have questions,
consult an authorized Yamaha ATV dealer.
8-2
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EBU02611
Periodic maintenance chart for the emission control system
NOTE:
8
8
For ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals.
For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance intervals. However, keep in mind that if the
ATV isn’t used for a long period of time, the month maintenance intervals should be followed.
INITIAL
3
EVERY
month
1
6
6
12
Whichever
comes first
ITEM
ROUTINE
km
(mi)
320
(200)
1300
(800)
2500
(1600)
2500
(1600)
5000
(3200)
hours
20
80
160
160
320
9 Check valve clearance.
9 Adjust if necessary.
Valves*
2
2
2
2
9 Check chain tension.
9 Adjust if necessary.
Cam chain*
Spark plug
Carburetor*
2
2
2
2
2
2
2
2
9 Check condition.
9 Adjust gap and clean.
9 Replace if necessary.
2
2
9 Check idle speed/choke lever operation.
9 Adjust if necessary.
2
2
2
2
2
2
Crankcase breather
system*
9 Check breather hose for cracks or damage.
9 Replace if necessary.
9 Check for leakage.
9 Tighten if necessary.
9 Replace gasket if necessary.
Exhaust system*
2
2
2
Spark arrester
Fuel line*
9 Clean.
2
2
2
2
2
2
9 Check fuel hose for cracks or damage.
9 Replace if necessary.
8-3
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General maintenance and lubrication chart
INITIAL
3
EVERY
month
1
6
6
12
Whichever
comes first
ITEM
ROUTINE
km
(mi)
320
(200)
1300
(800)
2500
(1600)
2500
(1600)
5000
(3200)
hours
20
80
160
160
320
9 Clean.
9 Replace if necessary.
Every 20–40 hours
(more often in wet or dusty areas)
Air filter element
Engine oil
9 Replace (warm engine before draining).
2
2
2
2
2
2
9 Check oil level/oil leakage.
9 Replace every 12 months.
Final gear oil
9 Check operation.
Brakes*
Clutch*
Wheels*
2
2
2
2
2
2
2
2
2
2
2
2
2
9 Adjust if necessary.
9 Check operation.
9 Adjust if necessary.
9 Check balance/damage/runout.
9 Replace if necessary.
9 Check brearing assemblies for looseness/
damage.
Wheel bearings*
Steering system*
2
2
2
2
2
2
2
2
9 Replace if damaged.
9 Check operation.
9 Replace if damaged.
9 Check toe-in.
2
2
9 Adjust if necessary.
Knuckle shafts/
steering shaft*
9 Lubricate every 6 months with Lithium-soap-based
grease.
2
2
2
2
2
2
9 Check all chassis fittings and fasteners.
9 Correct if necessary.
Fittings and fasteners*
2
8-4
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INITIAL
3
EVERY
month
1
6
6
12
Whichever
comes first
ITEM
ROUTINE
km
(mi)
320
(200)
1300
(800)
2500
(1600)
2500
(1600)
5000
(3200)
hours
20
80
160
160
320
9 Check specific gravity.
9 Check breather hose for correct routing.
9 Correct if necessary.
Battery*
2
2
2
2
2
*
Since these items require special tools, data and technical skills, have a Yamaha dealer perform the service.
w
Indicates a potential hazard that could result
in serious injury or death.
8-5
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EBU08682
Engine oil
w
e
Engine oil level measurement
1. Place the ATV on a level surface.
2. Warm up the engine for several minutes
and stop it.
q
3. Remove the dipstick and wipe it off with a
clean rag. Insert the dipstick in the filler
hole without screwing it in.
NOTE:
1. Dipstick
3. Minimum level mark
2. Maximum level mark
Wait a few minutes until the oil level settles
before checking.
Engine oil replacement
4. Remove the dipstick and inspect the oil
level.
5. The oil level should be between the maxi-
mum and minimum marks. If the level is
low, add oil to raise it to the specified level.
cC
1. Place the ATV on a level surface.
2. Warm up the engine for several minutes
and stop it.
3. Place a container under the engine.
4. Remove the dipstick and drain bolt to drain
the oil.
Be sure no foreign material enters the
crankcase.
5. Inspect the O-ring and replace if damaged.
8-6
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Recommended oil type:
YAMALUBE 4 (20W40) or SAE 20W40
YAMALUBE 4 (10W30) or SAE 10W30
SAE 5W30
Recommended oil classification:
API Service SE, SF, SG type or higher
Oil quantity:
Periodic oil change:
q
0.8 L (0.70 Imp qt, 0.85 US qt)
1. Drain bolt
cC
Be sure no foreign material enters the
crankcase.
6. Install the drain bolt and tighten to specifi-
cation.
Tightening torque
Drain bolt:
8. Warm up the engine for several minutes at
idle speed. Check for oil leakage while
warming up.
20 Nm (2.0 m0kgf, 14 ft0lbf)
7. Fill the engine with oil and install the dip-
stick.
cC
If oil leakage is found, stop the engine imme-
diately and check for the cause.
8-7
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EBU00869
Final gear oil
Final gear oil measurement
2
3
1. Place the ATV on a level surface.
2. Remove the dipstick and wipe it off with a
clean rag. Insert the dipstick in the filler
hole without screwing it in.
1
3. Remove the dipstick and inspect the oil
level.
4. The oil level should be between the maxi-
mum and minimum marks. If the level is
low, add oil to raise it to the proper level.
1. Dipstick
3. Minimum level mark
2. Maximum level mark
Final gear oil replacement
1. Place the ATV on a level place.
2. Place a container under the final gear
case.
cC
Be sure no foreign material enters the final
gear case.
3. Remove the dipstick and drain bolt to drain
the oil.
5. Install the dipstick.
8-8
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5. Fill the final gear case with oil.
Recommended oil:
SAE80API “GL-4” Hypoid gear oil
Oil quantity:
0.12L (0.11 Imp qt, 0.13 US qt)
q
cC
Be sure no foreign material enters the final
gear case.
1. Drain bolt
4. Install the drain bolt and tighten to specifi-
cation.
6. Install the dipstick.
7. Check for oil leakage. If oil leakage is
found, check for the cause.
Tightening torque
Drain bolt:
23 Nm (2.3 m0kgf, 17 ft0lbf)
8-9
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EBU11820
Spark plug inspection
Before installing the spark plug, measure the
electrode gap with a wire thickness gauge and
adjust it to specification.
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of the
spark plug can indicate the condition of the
engine.
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
For example, a very white center electrode
porcelain color could indicate an intake air leak
or carburetion problem for that cylinder. Do not
attempt to diagnose such problems yourself.
Instead, take the ATV to a Yamaha dealer. You
should periodically remove and inspect the
spark plug because heat and deposits will cause
the spark plug to slowly break down and erode.
If electrode erosion becomes excessive, you
should replace the spark plug with one of the
proper type.
a
a. Spark plug gap
Standard spark plug:
CR7HSA (NGK)
8-10
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When installing the spark plug, always clean the
gasket surface and its mating surface. Wipe off
any grime from the threads and tighten it to the
specified torque.
Tightening torque:
q
Spark plug:
12.5 Nm (1.25 m0kgf, 9.1 ft0lbf)
1. Check hose
EBU10343
1. Remove the front cover by removing the
bolts.
Air filter cleaning
NOTE:
w
There is a check hose at the bottom of the air fil-
ter case. If dust or water collects in this hose,
empty the hose and clean the air filter element
and air filter case.
w
q
1. Front cover
2. Bolt (×2)
8-11
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w
w
w
q
q
1. Air filter case cover
2. Fastener (×4)
1. Fastener
2. Air filter element
2. Remove the air filter case cover by
unhooking the fasteners.
3. Remove the air filter element by unhooking
the fastener.
4. Wash the air filter element gently but thor-
oughly in solvent.
8-12
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6. Inspect the air filter element. If damaged,
replace it.
7. Apply Yamaha foam air filter oil or other
quality foam air filter oil to the air filter ele-
ment.
q
WARNING
POTENTIAL HAZARD
Using low flash point solvents or gasoline
to clean the air filter element.
WHAT CAN HAPPEN
NOTE:
Low flash point solvents or gasoline can
catch fire or explode.
The air filter element should be wet but not drip-
ping.
HOW TO AVOID THE HAZARD
Use parts cleaning solvent to clean the air
filter element.
8. Install the air filter element.
9. Install the air filter case cover by hooking
the fasteners onto the air filter case.
5. Squeeze the excess solvent out of the air
filter element and let it dry.
10. Install the front cover by installing the bolts.
cC
Do not twist the air filter element when
squeezing it.
8-13
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EBU01035
Air intake restrictor plate removal
To obtain full engine performance capability,
removing the air intake restrictor plate is
required.
1. Remove the air filter element. (See page
8-11 for removal and installation procedures.)
2. Remove the air intake restrictor plate.
NOTE:
The air filter element should be cleaned every
20-40 hours. It should be cleaned and lubricated
more often if the machine is operated in
extremely dusty areas. Each time air filter ele-
ment maintenance is performed, check the air
inlet of the air filter case for obstructions. Check
the air cleaner rubber joint to the carburetor and
manifold fittings for an airtight seal. Tighten all
fittings securely to avoid the possibility of unfil-
tered air entering the engine.
q
cC
Never operate the engine with the air filter
element removed. This will allow unfiltered
air to enter the engine, causing rapid engine
wear and possible engine damage.
Additionally, operation without the filter ele-
ment will affect carburetor jetting with sub-
sequent poor performance and possible
engine overheating.
1. Air intake restrictor plate
8-14
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EBU13600
Spark arrester cleaning
NOTE:
Be sure the exhaust pipe and muffler are cool
before cleaning the spark arrester.
1. Remove the screws.
Store the air intake restrictor plate with the
owner’s manual so that you can install it when-
ever you want to reduce the top speed available.
3. Install the air filter element.
q
1. Screw (×2)
8-15
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2. Remove the tailpipe by pulling it out of the
muffler.
q
WARNING
POTENTIAL HAZARD
3. Tap the tailpipe lightly, then use a wire
brush to remove any carbon deposits from
the spark arrester portion of the tailpipe.
Improper cleaning of the spark arrester.
Hot exhaust system
WHAT CAN HAPPEN
q
e
Could injure the eyes.
w
Could cause burns.
Could cause carbon monoxide poisoning,
possibly leading to death.
Could start a fire.
HOW TO AVOID THE HAZARD
When cleaning the spark arrester:
Always let the exhaust system cool prior
to touching exhaust components.
Do not start the engine when cleaning the
exhaust system.
1. Tailpipe
3. Screw (×2)
2. Spark arrester
4. Insert the tailpipe into the muffler and align
the screw holes.
5. Install the screws and tighten them.
8-16
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EBU00296
EBU13020
Carburetor adjustment
Idle speed adjustment
The carburetor is a vital part of the engine and
requires very sophisticated adjustment. Most
adjusting should be left to a Yamaha dealer who
has the professional knowledge and experience
to do so. However, the idling speed may be per-
formed by the owner as a part of the usual main-
tenance routine.
NOTE:
A diagnostic tachometer must be used for this
procedure.
1. Start the engine and warm it up for a few
minutes at approximately 1,000 to 2,000
r/min. Occasionally rev the engine to 4,000
to 5,000 r/min. The engine is warm when it
quickly responds to the throttle.
cC
The carburetor was set at the Yamaha facto-
ry after many tests. If the settings are dis-
turbed by someone without sufficient techni-
cal knowledge, poor engine performance and
damage may result.
8-17
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EBU00303
Valve clearance adjustment
2. Connect the tachometer to the spark plug
lead, and then set the idle to the specified
idling speed by adjusting the throttle stop
screw. Turn the screw in direction a to
increase the engine speed, and in direction
b to decrease the engine speed.
The correct valve clearance changes with use,
resulting in improper fuel/air supply or engine
noise. To prevent this, the valve clearance must
be adjusted regularly. This adjustment however,
should be left to a professional Yamaha service
technician.
Specified idle speed:
1,750–1,850 r/min
EBU00304
Cam chain adjustment
The cam chain becomes loose with use, result-
ing in improper valve timing and engine noise.
To prevent this, the cam chain tensioner must
be adjusted regularly. This adjustment should be
left to a Yamaha service technician.
b
a
EBU01218
Front and rear brake shoe inspection
A wear indicator is provided on each brake. The
indicators allows checking of brake shoe wear
without disassembling the brake. Apply the brake
and check the position of the indicator. If the indi-
cator reaches the wear limit line or mark, ask a
Yamaha dealer to replace the shoes as a set.
q
1. Throttle stop screw
8-18
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EBU00323
Front
Front brake lever free play adjustment
NOTE:
Before adjusting the brake, inspect the front
brake shoes.
q
w
The front brake lever free play should be adjust-
ed to 10–12 mm (0.4–0.5 in) at the brake lever
pivot. If the free play is incorrect, adjust as fol-
lows:
1. Wear limit line
2. Wear indicator
Rear
a
q
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a. Free play
1. Wear limit mark
2. Wear indicator
8-19
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1. Loosen the upper locknut and fully turn in
the adjusting bolt.
2. Loosen the lower locknut.
3. Turn the lower adjusting bolt until specified
free play is obtained.
5. While applying the front brake, turn out the
upper adjusting bolt until the upper and
lower cable lengths are equal. The cable
joint will become vertical.
a
a=a’
q
q
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a’
r
e
1. Cable joint
1. Upper locknut
3. Lower locknut
2. Upper adjusting bolt
4. Lower adjusting bolt
6. Tighten the upper locknut.
Specified free play:
10–12 mm (0.4–0.5 in)
4. Tighten the lower locknut.
8-20
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EBU03351
Rear brake lever and brake pedal adjustment
Brake lever free play adjustment
1. Loosen the brake cable locknut.
2. Turn the adjusting bolt at the brake lever
until brake lever free play is 5–8 mm
(0.20–0.30 in).
q
WARNING
POTENTIAL HAZARD
Operating with improperly serviced or
adjusted brakes.
WHAT CAN HAPPEN
3. Tighten the locknut.
You could lose braking ability, which
could lead to an accident.
q
w
a
HOW TO AVOID THE HAZARD
After servicing:
8 Make sure the brakes operate smooth-
ly and that the free play is correct.
8 Make sure the brakes do not drag.
Replacement of brake components
requires professional knowledge. These
procedures should be performed by
Yamaha dealer.
a. Free play
1. Locknut
2. Adjusting bolt
8-21
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Brake pedal free play adjustment
Turn the brake rod adjusting nut at the rear
wheel hub until brake pedal free play is 20–
30 mm (0.8–1.2 in).
NOTE:
If specified free play cannot be obtained, tighten
the brake cable adjusting nut at the rear wheel
hub until brake lever free play is 5–8 mm
(0.20–0.30 in).
a
a. Free play
q
1. Brake cable adjusting nut
8-22
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q
WARNING
POTENTIAL HAZARD
Operating with improperly serviced or
adjusted brakes.
WHAT CAN HAPPEN
q
You could lose braking ability, which
could lead to an accident.
HOW TO AVOID THE HAZARD
1. Brake rod adjusting nut
After servicing:
8 Make sure the brakes operate smooth-
ly and that the free play is correct.
8 Make sure the brakes do not drag.
Replacement of brake components
requires professional knowledge. These
procedures should be performed by a
Yamaha dealer.
8-23
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EBU00872
Clutch adjustment
1. Remove the rubber cap.
2. Loosen the locknut.
3. Slowly turn the adjusting bolt clockwise
until resistance is felt. Then turn it 1/8
counterclockwise.
NOTE:
Turn the adjusting bolt clockwise to decrease
the clutch free play and turn it counterclockwise
to increase the free play.
5. Install the rubber cap securely.
q
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1. Rubber cap
2. Locknut
3. Adjusting bolt
4. Tighten the locknut to the specified torque.
Tightening torque:
8 Nm (0.8 m0kgf, 5.8 ft0lbf)
8-24
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EBU00356
Cable inspection and lubrication
Lubricate the inner cables and the cable ends. If
the cables do not operate smoothly, ask a
Yamaha dealer to replace them.
q
WARNING
POTENTIAL HAZARD
Damaged control cables.
WHAT CAN HAPPEN
Recommended lubricant:
Yamaha chain and cable lube or
SAE 10W30 motor oil
Corrosion can result when the outer cov-
ering of control cables becomes damaged.
Cables can also become frayed or kinked.
Operation of controls could be restricted,
which could cause an accident or injury.
EBU00727
Brake and shift pedal/brake lever lubrication
Lubricate the pivoting parts of each lever and
pedal.
HOW TO AVOID THE HAZARD
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
Inspect cables frequently. Replace dam-
aged cables.
8-25
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EBU01220
Rear
Front
Knuckle shaft and steering shaft lubrication
Lubricate the pivot points using a grease gun.
q
w
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
q
1. Wheel nut (×4)
EBU00871
2. Wheel nut (×3)
Wheel installation
When installing the wheel, reverse the removal
procedure.
Tighten the wheel nuts to the specified torques.
1
1
1. Grease nipple
EBU01112
Tightening torque:
Wheel nut:
Wheel removal
Front: 28 Nm (2.8 m0kgf, 20 ft0lbf)
Rear: 28 Nm (2.8 m0kgf, 20 ft0lbf)
1. Loosen the wheel nuts.
2. Elevate the ATV and place a suitable stand
under the frame.
3. Remove the nuts from the wheel.
4. Remove the wheel.
8-26
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EBU00378
Battery
Check the level of the battery fluid and see if the
terminals are tight. Add distilled water if the fluid
level is low.
q
w
cC
Do not leave or store the battery on its side.
When inspecting the battery, be sure the
breather hose is routed correctly. If it touch-
es the frame or exists in such a way as to
cause battery electrolyte or gas to exit onto
the frame, structural and cosmetic damage
to the machine can occur.
1. Battery
2. Battery breather hose
8-27
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q
WARNING
EYES: Flush with water for 15 minutes and
get prompt medical attention. Keep batter-
ies away from sparks, flames, cigarettes
or other sources of ignition. Ventilate
when charging or using in a closed space.
POTENTIAL HAZARD
Failure to handle batteries or battery elec-
trolyte carefully.
WHAT CAN HAPPEN
You could be poisoned. You could be
severely burned by the sulfuric acid in bat-
tery electrolyte.
Batteries produce explosive gases.
HOW TO AVOID THE HAZARD
Avoid contact with skin, eyes or clothing.
Always shield eyes when working near
batteries. Keep out of reach of children.
Antidote:
EXTERNAL: Flush with water.
INTERNAL: Drink large quantities of water
or milk. Follow with milk of magnesia,
beaten egg or vegetable oil. Get prompt
medical attention.
8-28
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EBU11950
Replenishing the battery fluid
cC
A poorly maintained battery will corrode and dis-
charge quickly. The battery fluid should be
checked at least once a month.
Normal tap water contains minerals which
are harmful to a battery. Therefore, refill only
with distilled water.
1. The level should be between the maximum
and minimum level marks. Use only dis-
tilled water if refilling is necessary.
4. When the machine is not to be used for a
month or longer, remove the battery and
store it in a cool, dark place. Completely
recharge the battery before using.
5. If the battery is to be stored for a longer
period than the above, check the specific
gravity at least once a month and recharge
the battery when it is too low.
r
q
6. Always make sure the connections are cor-
rect when putting the battery back in the
machine. Make sure the breather hose is
properly connected and is not damaged or
obstructed.
e
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1. Maximum level mark
3. Negative lead
2. Minimum level mark
4. Positive lead
2. Disconnect the negative (–) lead.
3. Disconnect the positive (+) lead, and then
remove the battery.
8-29
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EBU00390
Fuse replacement
q
WARNING
1. The fuse case is located under the seat.
2. If the fuse is blown, turn off the main switch
and install a new fuse of the specified
amperage. Then turn on the switches. If
the fuse immediately blows again, consult
a Yamaha dealer.
POTENTIAL HAZARD
Using an improper fuse.
WHAT CAN HAPPEN
An improper fuse can cause damage to
the electrical system which could lead to a
fire.
Specified fuse: 5 A
HOW TO AVOID THE HAZARD
Always use a fuse of the specified rating.
Never use a material in place of the proper
fuse.
q
cC
To prevent accidental short-circuiting, turn
off the main switch when checking or replac-
ing a fuse.
w
1. Fuse
2. Spare fuse
8-30
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EBU00412
Troubleshooting
q
WARNING
Although Yamaha machines receive a rigid
inspection before shipment from the factory,
trouble may occur during operation. Any prob-
lem in the fuel, compression, or ignition systems
can cause poor starting and loss of power. The
troubleshooting chart describes a quick, easy
procedure for making checks. If your machine
requires any repair, take it to a Yamaha dealer.
POTENTIAL HAZARD
Checking the fuel system while smoking
or near an open flame.
WHAT CAN HAPPEN
Fuel can ignite or explode, causing severe
injury or property damage.
HOW TO AVOID THE HAZARD
Do not smoke when checking the fuel sys-
tem. Make sure there are no open flames
or sparks in the area, including pilot lights
from water heaters or furnaces.
The skilled technicians at a Yamaha dealership
have the tools, experience, and know-how to
properly service your machine. Use only gen-
uine Yamaha parts on your machine. Imitation
parts may look like Yamaha parts, but they are
often inferior. Consequently, they have a shorter
service life and can lead to expensive repair
bills.
8-31
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EBU00440
Remove the
fuel hose from
the fuel cock.
Water or dirt
mixed in fuel
Clean the fuel filter
and the fuel tank
Troubleshooting chart
Turn the fuel
cock to “ON”
Check fuel flow
No fuel
Fuel cock clogged
Clean fuel cock
Turn the fuel
cock to “OFF”
There is fuel
1. Fuel
Check if there is
fuel in the fuel
tank
Turn the fuel
cock to “RES”
Some fuel
No fuel
Restart engine
Supply fuel
2. Compression
Use electric starter
to see if there is
compression
There is compresson
No compression
Compression normal
Ask a Yamaha dealer to inspect
Wipe clean with dry
cloth
3. Ignition
Wet
Dry
Remove spark
plug and check
electrodes
Spark good
Ignition system normal
Attach spark plug
cap and ground to
chassis
Use electric
starter
Spark weak
No spark
Adjust spark plug
gap or replace
spark plug
Engine turns
over quickly
4. Battery
Battery good
Use electric
starter
Ask a Yamaha dealer to inspect
Engine turns
over slowly
Check fluid, recharge,
check connections
8-32
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EBU00419
3. Rinse the dirt and degreaser off with a gar-
den hose. Use only enough pressure to do
the job.
CLEANING AND STORAGE
A. CLEANING
Frequent, thorough cleaning of your machine
will not only enhance its appearance but will
improve its general performance and extend the
useful life of many components.
cC
Excessive water pressure may cause water
seepage and deterioration of wheel bearings,
brakes, transmission seals and electrical
devices. Many expensive repair bills have
resulted from improper high pressure deter-
gent applications such as those available in
coin-operated car washers.
1. Before cleaning the machine:
a. Block off the end of the exhaust pipe to
prevent water entry. A plastic bag and
strong rubber band may be used.
b. Make sure the spark plug and all filler caps
are properly installed.
4. Once the majority of the dirt has been
hosed off, wash all surfaces with warm
water and mild, detergent-type soap. An
old toothbrush or bottle brush is handy for
hard-to-get-at places.
2. If the engine case is excessively greasy,
apply degreaser with a paint brush. Do not
apply degreaser to the wheel axles.
9-1
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5. Rinse the machine off immediately with
clean water and dry all surfaces with a
chamois, clean towel or soft absorbent
cloth.
6. Clean the seat with a vinyl upholstery
cleaner to keep the cover pliable and
glossy.
7. Automotive type wax may be applied to all
painted and chrome plated surfaces. Avoid
combination cleaner-waxes. Many contain
abrasives which may mar the paint or pro-
tective finish.
q
WARNING
POTENTIAL HAZARD
Operation with wet brakes after washing.
WHAT CAN HAPPEN
Wet brakes may have reduced stopping
ability, increasing the chance of an acci-
dent.
HOW TO AVOID THE HAZARD
Test the brakes after washing. Apply the
brakes several times at slow speeds to let
friction dry out the linings.
9
When finished, start the engine and let it
idle for several minutes.
9-2
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EBU00530
B. STORAGE
reinstall the spark plug. Ground the spark
plug wire and turn the engine over several
times to coat the cylinder wall with oil.
3. Lubricate all control cables.
4. Block up the frame to raise all wheels off
the ground.
Long term storage (60 days or more) of your
machine will require some preventive proce-
dures to guard against deterioration. After thor-
oughly cleaning the machine, prepare for stor-
age as follows:
1. Fill the fuel tank with fresh fuel and add the
specified amount of Yamaha Fuel
Stabilizer and Conditioner or an equivalent
product.
5. Tie a plastic bag over the exhaust pipe out-
let to prevent moisture from entering.
6. If storing in a humid or salt-air atmosphere,
coat all exposed metal surfaces with a light
film of oil. Do not apply oil to any rubber
parts or the seat cover.
7. Remove the battery and charge it. Store it
in a dry place and recharge it once a
month. Do not store the battery in an
excessively warm or cold place (less than
0˚C (30˚F) or more than 30˚C (90˚F).
Specified amount:
1 oz of stabilizer to each gallon of fuel
(or 7.5 cc of stabilizer to each liter of fuel)
NOTE:
Use of fuel stabilizer and conditioner eliminates
the need to drain the fuel system. Consult a
Yamaha dealer if the fuel system needs to be
drained instead.
NOTE:
Make any necessary repairs before storing the
2. Remove the spark plug, pour about one
tablespoon of SAE 10W30 or 20W40
motor oil in the spark plug hole and
machine.
9-3
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EBU00428
SPECIFICATIONS
Model
YFM80R
Dimension:
Overall length
Overall width
Overall height
Seat height
Wheel base
Ground clearance
1,537 mm (60.5 in)
841 mm (33.1 in)
940 mm (37.0 in)
669 mm (26.3 in)
1,030 mm (40.6 in)
100 mm ( 3.94 in)
2,400 mm (94.5 in)
Minimum turning radius
Basic weight:
With oil and full fuel tank
116 kg (256 lb)
Engine:
Type
10
Air cooled, 4-stroke, SOHC
Single cylinder, Forward inclined
79 cm3 (4.82 cu.in)
47.0 × 45.6 mm (1.85 × 1.80 in)
9.6 : 1
Cylinder arrangement
Displacement
Bore × Stroke
Compression ratio
Starting system
Lubrication system
Electric starter
Wet sump
10-1
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Model
YFM80R
Engine oil:
Type
0°
10°
30°
50°
70°
90° 110°
130°F
YAMALUBE 4 (20W40) or SAE20W40
YAMALUBE 4 (10W30) or SAE10W30
SAE 5W30
–20° –10°
10°
20°
30°
50°C
0°
40°
Recommended engine oil classification:
API Service SE, SF, SG type or higher
cC
In order to prevent clutch slippage (since the
engine oil also lubricates the clutch), do not
mix any chemical additives. Do not use oils
with a diesel specification of “CD” or oils of
a higher quality than specified. In addition,
do not use oils labeled “ENERGY CONSERV-
ING II” or higher.
Quantity:
Periodic oil change
0.80 L (0.70 lmp qt, 0.85 US qt)
10-2
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Model
YFM80R
Final gear oil:
Type
SAE80API “GL-4” Hypoid gear oil
Quantity:
Total amount
0.12 L (0.11 Imp qt, 0.13 US qt)
Wet type element
Air filter:
Fuel:
Type
Tank capacity
Reserve amount
UNLEADED GASOLINE ONLY
6.8 L (1.5 Imp gal, 1.8 US gal)
0.9 L (0.2 Imp gal, 0.2 US gal)
Carburetor:
Type/manufacturer
VM16SH/MIKUNI
Spark plug:
Type/manufacturer
Gap
CR7HSA/NGK
0.6–0.7 mm (0.024–0.028 in)
Clutch type:
Wet, multiple-disc automatic
10-3
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Model
YFM80R
Transmission:
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Transmission type
Operation
Spur gear
65/20 (3.250)
Shaft drive
19/18 × 34/10 (3.588)
Constant mesh 3-speed
Left foot operation
Gear ratio:
1st
2nd
3rd
39/11 (3.545)
35/17 (2.059)
31/22 (1.409)
Chassis:
Frame type
Caster angle
Trail
Steel tube
1°
3.8 mm (0.15 in)
Tire:
Type
Tubeless
Size : Front
: Rear
AT18 × 7-7
AT18 × 8-7
Manufacturer/type
Front
DUNLOP/KT586
DUNLOP/KT587
Rear
10-4
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Model
YFM80R
Brake:
Front brake type
Operation
Rear brake type
Operation
Drum brake
Right hand operation
Drum brake
Left hand and right foot operation
Suspension:
Front
Rear
Leading arm
Swingarm
Shock Absorber:
Front
Rear
Coil spring/Oil damper
Coil spring/Oil damper
Wheel travel:
Front
Rear
57 mm (2.24 in)
56 mm (2.2 in)
Electrical:
Ignition system
Charging system
Battery type/voltage, capacity
C.D.I.
A.C. magneto
12N7D-3B/12V, 7Ah
Indicator light voltage, wattage × quantity:
Neutral
12V, 1.7W × 1
Fuse:
5A
10-5
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EBU13640
NOISE REGULATION
TAMPERING WITH NOISE CONTROL SYSTEM PROHIBITED:
Federal law prohibits the following acts or the causing thereof: (1) The removal or rendering inopera-
tive by any person other than for purposes of maintenance, repair, or replacement of any device or
element of design incorporated into any new vehicle for the purpose of noise control prior to its sale or
delivery to the ultimate purchaser or while it is in use or (2) the use of the vehicle after such device or
element of design has been removed or rendered inoperative by any person.
“AMONG THOSE ACTS PRESUMED TO CONSTITUTE TAMPERING ARE THE ACTS LISTED
BELOW.”
These acts include tampering with the following systems; i.e., modification, removal, etc.
Muffler
Exhaust system
Intake system
Exhaust pipe
Silencer
Air cleaner case
Air cleaner element
Intake duct
11-1
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EBU13653
MAINTENANCE RECORD
Copies of work orders and/or receipts for parts you purchase and install will be required to document
maintenance done in accordance with the warranty. The chart below is printed only as a reminder to
you that the maintenance work is required. It is not acceptable proof of maintenance work.
MAINTENACE
DATE OF
SERVICE
SERVICING DEALER
NAME AND ADDRESS
INTERVAL
km (mi)
MILEAGE
REMARKS
month
1
hours
20
320 (200)
3
1,300 (800)
80
6
2,500 (1,600)
5,000 (3,200)
7,500 (4,800)
10,000 (6,400)
12,500 (8,000)
15,000 (9,600)
17,500 (11,200)
20,000 (12,800)
22,500 (14,400)
25,000 (16,000)
160
12
18
24
30
36
42
48
54
60
320
480
640
800
11
12
960
1,120
1,280
1,440
1,600
12-1
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EBU26310
YAMAHA MOTOR CORPORATION, U.S.A.
ATV LIMITED WARRANTY
13-1
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13
13-2
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EBU00435
14-1
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14
14-2
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EBU00436
w
Indicates a potential hazard that could
result in serious injury or death.
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EBU00437
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EBU00438
q
WARNING
Improper ATV use can result in SEVERE INJURY or DEATH.
ALWAYS USE
NEVER USE
ON PUBLIC
ROADS
NEVER CARRY
PASSENGERS
NEVER USE
WITH DRUGS
OR ALCOHOL
AN APPROVED
HELMET AND
PROTECTIVE GEAR
NEVER operate:
ALWAYS:
9 without proper training or instruction.
9 at speeds too fast for your skills or the
conditions.
9 use proper riding techniques to avoid
vehicle overturns on hills and rough
terrain and in turns.
9
on public roads - a collision can occur with
another vehicle.
9 avoid paved surfaces - pavement may
seriously affect handling and control.
9 with a passenger - passengers affect
balance and steering and increase risk
of losing control.
LOCATE AND READ OWNER’S MANUAL. FOLLOW ALL INSTRUCTIONS AND WARNINGS.
(For replacement manual, call 1-800-532-1558)
YAMAHA MOTOR CO., LTD.
PRINTED IN JAPAN
2005.7-2.7x1 !
(E)
PRINTED ON RECYCLED PAPER
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Dear New Yamaha ATV Owner:
CONGRATULATIONS ON THE PURCHASE OF YOUR NEW YAMAHA ATV. You have purchased a quality
Yamaha product that, with proper use and care, will provide hours of riding pleasure. BEFORE YOU
OPERATE YOUR NEW ATV, Yamaha recommends these important points:
8 READ YOUR OWNER’S MANUAL
8 A CHILD UNDER 6 YEARS OLD SHOULD NOT OPERATE AN ATV WITH ENGINE SIZE 50CC OR GREATER
8 A CHILD UNDER 12 YEARS OLD SHOULD NOT OPERATE AN ATV WITH ENGINE SIZE 70CC OR GREATER
8 A CHILD UNDER 16 YEARS OLD SHOULD NOT OPERATE AN ATV WITH ENGINE SIZE GREATER
THAN 90CC
8 TAKE THE FREE HANDS-ON TRAINING COURSE OFFERED BY YAMAHA – ASK YOUR DEALER FOR
DETAILS OR CALL 1-800-887-2887
If you have any questions about these points, or if you purchased your ATV from an authorized Yamaha
dealership and were not informed of the age recommendation for your ATV by the dealership, please
fill out the information below and mail this card to yamaha today.
Name:
Purchase Date:
ATV Model:
MO.
DAY
YR.
Primary I.D. [Engine Number]:
Address:
Dealer Name & Address:
Telephone:
[
]
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NO POSTAGE
NECESSARY
IF MAILED
IN THE
UNITED STATES
FIRST CLASS
PERMIT NO. 4
CYPRESS, CA
POSTAGE WILL BE PAID BY ADDRESSEE
YAMAHA MOTOR CORPORATION U.S.A.
P.O. BOX 6555
CYPRESS, CALIFORNIA 90630-9989
ATTN: SALES ADMINISTRATION
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