EBU17420
TABLE OF CONTENTS
SAFETY INFORMATION .............................. 1-1
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ............................ 2-1
DESCRIPTION .............................................. 3-1
Left view ..................................................... 3-1
Right view................................................... 3-1
Controls and instruments ........................... 3-2
INSTRUMENT AND CONTROL
FUNCTIONS .................................................. 4-1
Main switch ............................................... 4-1
Indicator light ............................................. 4-2
Handlebar switches ................................... 4-2
Throttle lever ............................................. 4-3
Throttle OverRide System ......................... 4-4
Speed limiter ............................................. 4-4
Clutch lever ............................................... 4-5
Brake lever ................................................ 4-5
Brake pedal ............................................... 4-5
Parking brake ............................................ 4-6
Shift pedal ................................................. 4-7
Kickstarter ................................................. 4-7
Fuel tank cap ............................................. 4-8Fuel ............................................................ 4-8
Fuel cock ................................................... 4-9
Starter (choke) ......................................... 4-11
Seat ......................................................... 4-11
Adjusting the front shock absorber
assemblies .............................................4-12
Adjusting the rear shock absorber
assembly ................................................4-13
PRE-OPERATION CHECKS ..........................5-1
Pre-operation check list ............................. 5-1
Fuel ............................................................ 5-4
2-stroke engine oil ..................................... 5-4
Transmission oil ......................................... 5-4
Front and rear brakes ................................ 5-4
Throttle lever .............................................. 5-5
Drive chain ................................................. 5-5
Tires ........................................................... 5-6
Measuring the tire pressure ....................... 5-7
Tire wear limit ............................................ 5-8
Chassis fasteners ...................................... 5-8
Instruments, lights and switches ................ 5-8
OPERATION...................................................6-1
Starting a cold engine ................................ 6-1
Starting a warm engine .............................. 6-2
Shifting ...................................................... 6-2
Engine break-in ......................................... 6-4
Parking ...................................................... 6-5
Parking on a slope .................................... 6-6
Accessories and loading ........................... 6-6
RIDING YOUR ATV ...................................... 7-1
GETTING TO KNOW YOUR ATV.............. 7-2
RIDE WITH CARE AND GOOD
JUDGEMENT ...........................................7-2
BE CAREFUL WHERE YOU RIDE ............ 7-8
TURNING YOUR ATV ............................. 7-12
CLIMBING UPHILL .................................. 7-14
RIDING DOWNHILL................................. 7-16
CROSSING A SLOPE.............................. 7-17
CROSSING THROUGH SHALLOW
WATER ..................................................7-18
RIDING OVER ROUGH TERRAIN .......... 7-20
SLIDING AND SKIDDING ........................ 7-20
WHAT TO DO IF... ................................... 7-21
WHAT TO DO... ....................................... 7-21
PERIODIC MAINTENANCE AND MINOR
REPAIR .......................................................... 8-1
Owner’s manual and tool kit ...................... 8-1
Periodic maintenance and lubrication
chart ........................................................ 8-3
Checking the spark plug ............................ 8-7
Transmission oil ........................................ 8-8Autolube pump ......................................... 8-11
Cleaning the air filter element .................. 8-11
Cleaning the spark arrester ..................... 8-14
Changing the carburetor settings ............. 8-16
Adjusting the engine idling speed ............ 8-21
Adjusting the throttle cable free play ........ 8-22
Checking the front and rear brake
pads ....................................................... 8-23
Checking the brake fluid level .................. 8-24
Changing the brake fluid .......................... 8-25
Checking the front brake lever free
play ........................................................ 8-25
Checking the brake pedal position ........... 8-26
Adjusting the parking brake free play ...... 8-27
Brake light switches ................................. 8-29
Adjusting the clutch lever free play .......... 8-29
Drive chain slack ...................................... 8-30
Lubricating the drive chain ....................... 8-32
Checking and lubricating the cables ........ 8-33
Checking and lubricating the brake and
clutch levers ........................................... 8-34
Checking and lubricating the brake and
shift pedals ............................................. 8-34
Checking the wheel bearings ................... 8-34
Lubricating the swingarm pivots .............. 8-34
Lubricating the upper and lower arm
pivots ..................................................... 8-35
Lubricating the steering shaft ................... 8-35
Replacing the headlight bulb ................... 8-36
1-3
1
2
3
4
5
6
7
8
9
10
11
ing, use the proper gear and maintain a steady
speed when climbing a hill. If you stall or roll
backwards, follow the special procedure for
braking described in this manual. Dismount on
the uphill side or to a side if pointed straight up-
hill. Turn the ATV around and remount, following
the procedure described in this manual.
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 obsta-
cles as described in this manual.
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 re-
duce the chance of skidding or sliding out of con-
trol.
Never operate an ATV in fast flowing water or in
water deeper than that recommended in this
manual. 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.
Always use the size and type of tires specified in
this manual.
Always maintain proper tire pressure as de-
scribed in this manual.
Never modify an ATV through improper installa-
tion or use of accessories.
Never exceed the stated load capacity for an
ATV. Cargo should be properly distributed and
securely attached. Reduce speed and follow in-
structions in this manual for carrying cargo or
pulling a trailer. Allow greater distance for brak-
ing.
WARNING
EWB00061
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 ex-
haust pipe/muffler when refueling. Never re-
fuel while smoking, or in the vicinity of
sparks, open flames, or other sources of ig-
nition such as the pilot lights of water heat-
ers and clothes dryers. Gasoline can catch
fire and you could be burned.
When transporting the ATV in another vehi-
cle, be sure it is kept upright and that the fuel
4-2
1
2
34
5
6
7
8
9
10
11
EBU17781
Indicator light
EBU17881
2-stroke engine oil level warning light “”
This warning light comes on when the oil level in
the 2-stroke engine oil tank is low during operation.
If the warning light comes on during operation,
stop the engine when it is safe to do so, and fill the
oil tank with Yamalube 2 or equivalent 2-stroke en-
gine oil. The warning light should go off after the oil
tank has been refilled.
The electrical circuit of the warning light can be
checked by starting the engine. (See page 6-1.) Ifthe warning light does not come on for a few sec-
onds, then go off, have a Yamaha dealer check the
electrical circuit.CAUTION:
ECB00020
Always make sure there is enough engine oil
before starting the engine.
EBU18061
Handlebar switches
1. Oil level warning light “ ”
1
1. Light switch “LIGHTS”
2. Engine stop switch “ENG. STOP”
1
2
4-3
1
2
34
5
6
7
8
9
10
11
EBU18070
Engine stop switch “ENG. STOP”
Set this switch to “RUN” before starting the engine.
The engine stop switch controls the ignition and
stops the engine when it is running. Use this switch
to stop the engine in an emergency situation. The
engine will not start or run when this switch is set
to “OFF”.
EBU18110
Light switch “LIGHTS”
Set this switch to “LO” to turn on the low beam and
the taillight. Set the switch to “HI” to turn on the
high beam and the taillight. Set the switch to “OFF”
to turn off all the lights.
NOTE:
The headlight and the taillight can be turned on
only when the engine is running.
EBU18280
Throttle lever
Once the engine is running, movement of the throt-
tle lever will increase the engine speed.
Regulate the speed of the ATV by varying the
throttle position. Because the throttle is spring-
loaded, the ATV will decelerate, and the engine will
return to an idle any time the hand is removed fromthe 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.WARNING
EWB00250
Malfunction of the throttle could make it diffi-
cult to speed up or slow down when you need
to. This could cause an accident. Check the op-
eration of the throttle lever before you start the
engine. If the throttle does not work smoothly,
check for the cause. Correct the problem be-
1. Throttle lever
1
8-7
1
2
3
4
5
6
78
9
10
11
EBU23211
Checking the spark plug
The spark plug is an important engine component,
which is easy to check. Since heat and deposits
will cause any spark plug to slowly erode, the spark
plug should be removed and checked in accor-
dance with the periodic maintenance and lubrica-
tion chart. In addition, the condition of the spark
plug can reveal the condition of the engine.
To remove the spark plug
1. Remove the spark plug cap.
2. Remove the spark plug as shown, with thespark plug wrench included in the owner’s tool
kit.
To check the spark plug
1. Check that the porcelain insulator around the
center electrode of the spark plug is a medi-
um-to-light tan (the ideal color when the ATV
is ridden normally).
NOTE:
If the spark plug shows a distinctly different color,
the engine could be operating improperly. Do not
attempt to diagnose such problems yourself. In-
stead, have a Yamaha dealer check the ATV.
1. Spark plug cap
1
1. Spark plug wrench
1
INDEX
A
Accessories and loading ................................................ 6-6
Air filter element, cleaning ............................................ 8-11
Autolube pump ............................................................. 8-11
B
Brake and clutch levers, checking and lubricating ....... 8-34
Brake and shift pedals, checking and lubricating ......... 8-34
Brake fluid, changing.................................................... 8-25
Brake fluid level, checking............................................ 8-24
Brake lever ..................................................................... 4-5
Brake lever free play, checking the front ...................... 8-25
Brake light switches ..................................................... 8-29
Brake pads, checking the front and rear ...................... 8-23
Brake pedal .................................................................... 4-5
Brake pedal position, checking .................................... 8-26
Brakes, front and rear .................................................... 5-4
C
Cables, checking and lubricating ................................. 8-33
Carburetor settings, changing ...................................... 8-16
Chassis fasteners........................................................... 5-8
Cleaning ......................................................................... 9-1
Clutch lever .................................................................... 4-5
Clutch lever free play, adjusting ................................... 8-29
D
Drive chain ..................................................................... 5-5
Drive chain, lubricating ................................................. 8-32Drive chain slack .......................................................... 8-30
E
Engine break-in .............................................................. 6-4
Engine, cold start ........................................................... 6-1
Engine idling speed ...................................................... 8-21
Engine, starting a warm ................................................. 6-2
Engine stop switch ......................................................... 4-3
F
Fuel ........................................................................ 4-8
,
5-4
Fuel cock ........................................................................ 4-9
Fuel tank cap.................................................................. 4-8
H
Handlebar switches ........................................................ 4-2
Headlight beam, adjusting............................................ 8-40
Headlight bulb, replacing.............................................. 8-36
I
Identification numbers .................................................. 11-1
Indicator light .................................................................. 4-2
Instruments, lights and switches .................................... 5-8
K
Key identification number ............................................. 11-1
Kickstarter ...................................................................... 4-7
L
Label locations ............................................................... 2-1
Light switch .................................................................... 4-3
M
Main switch .....................................................................4-1
Model label....................................................................11-2
O
Owner’s manual and tool kit............................................8-1
P
Parking ............................................................................6-5
Parking brake ..................................................................4-6
Parking brake free play, adjusting.................................8-27
Parking on a slope ..........................................................6-6
Part locations ..................................................................3-1
Periodic maintenance and lubrication chart ....................8-3
Pre-operation check list ..................................................5-1
R
Riding your ATV ..............................................................7-1
S
Safety information ...........................................................1-1
Seat...............................................................................4-11
Shifting ............................................................................6-2
Shift pedal .......................................................................4-7
Shock absorber assemblies, adjusting the front ...........4-12
Shock absorber assembly, adjusting the rear ...............4-13
Spark arrester, cleaning ................................................8-14
Spark plug, checking.......................................................8-7
Specifications ................................................................10-1
Speed limiter ...................................................................4-4
Starter (choke) ..............................................................4-11
Steering shaft, lubricating .............................................8-35
Storage ...........................................................................9-2
Suspension, lubricating the upper and lower arm
pivots ..........................................................................8-35Swingarm pivots, lubricating ........................................ 8-34
T
Tail/brake light bulb, replacing ..................................... 8-41
Throttle cable free play, adjusting ................................ 8-22
Throttle lever ...........................................................4-3
,
5-5
Throttle OverRide System.............................................. 4-4
Tire pressure, measuring ............................................... 5-7
Tires ............................................................................... 5-6
Tire wear limit................................................................. 5-8
Transmission oil ......................................................5-4
,
8-8
Troubleshooting ........................................................... 8-43
Troubleshooting chart .................................................. 8-45
Two-stroke engine oil ..................................................... 5-4
Two-stroke engine oil level warning light ....................... 4-2
V
Vehicle identification number ....................................... 11-1
W
Wheel bearings, checking ............................................ 8-34
Wheel, installing ........................................................... 8-43
Wheel, removing .......................................................... 8-42