2001 YAMAHA WARRIOR 350 engine

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CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ....................... 1-1
SAFETY INFORMATION ........................ 2-1
DESCRIPTION AND MACHINE
IDENTIFICATION .................................... 3-1
Identification number records........... 3-3
Key identification number ................. 3-5
Vehicle identification number ........... 3-5
Model label ......................................... 3-7
CONTROL FUNCTIONS ......................... 4-1
Main switch ........................................ 4-1
Indicator lights.................................... 4-3
Handlebar switches............................ 4-5
Throttle lever ...................................... 4-9
Speed limiter .................................... 4-11
Clutch lever ....................................... 4-13
Front brake lever .............................. 4-13
Rear brake pedal .............................. 4-15
Parking brake .................................... 4-17
Shift pedal......................................... 4-21Drive select lever...............................4-21
Fuel tank cap .....................................4-23
Fuel cock ............................................4-23
Starter (choke) ...................................4-25
Seat ....................................................4-27
Front shock absorber adjustment....4-29
Rear shock absorber adjustment .....4-31
PRE-OPERATION CHECKS .....................5-1
Front and rear brakes .........................5-5
Fuel.......................................................5-9
Engine oil ...........................................5-13
Chain ..................................................5-15
Throttle lever .....................................5-17
Fittings and Fasteners ......................5-17
Lights .................................................5-17
Switches ............................................5-17
Battery................................................5-19
Tires ...................................................5-19
How to measure tire pressure .........5-23
Tire wear limit ...................................5-25
1234
5

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OPERATION ........................................... 6-1
Starting a cold engine ....................... 6-3
Starting a warm engine ..................... 6-9
Warming up ........................................ 6-9
Drive select lever operation and
reverse driving ............................... 6-11
Shifting ............................................. 6-15
To start out and accelerate .............. 6-17
To decelerate .................................... 6-21
Engine break-in ................................ 6-23
Parking .............................................. 6-27
Parking on a slope ........................... 6-29
Accessories and loading ................. 6-31
RIDING YOUR ATV ................................ 7-1
Getting to know your ATV ................. 7-3
Ride with care and good
judgement ........................................ 7-5
Be careful where you ride ............... 7-27
Turning your ATV ............................ 7-39
Climbing uphill ................................. 7-45
Riding downhill ................................ 7-55
Crossing a slope ............................... 7-59
Crossing through shallow water .... 7-63
Riding over rough terrain ................ 7-67Sliding and skidding ........................ 7-69
What to do if ..................................... 7-73
What to do ........................................ 7-73
PERIODIC MAINTENANCE AND
ADJUSTMENT ....................................... 8-1
Owner’s manual and tool kit ............. 8-3
Periodic maintenance/lubrication ..... 8-7
Engine oil .......................................... 8-15
Spark plug inspection ...................... 8-25
Air filter cleaning.............................. 8-29
Carburetor adjustment .................... 8-33
Idle speed adjustment ..................... 8-35
Valve clearance adjustment ............ 8-37
Throttle lever adjustment ................ 8-37
Front and rear brake pad
inspection ....................................... 8-39
Inspecting the brake fluid level ....... 8-41
Brake fluid replacement .................. 8-45
Front brake lever free play
adjustment ..................................... 8-47
Rear brake adjustment .................... 8-49
Parking brake adjustment ............... 8-51
Clutch lever free play adjustment... 8-55
Drive chain slack check.................... 8-57
Drive chain slack adjustment .......... 8-59
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8

2-1
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SAFETY INFORMATION

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
precautions.
SEVERE INJURY OR DEATH can result if you
do not follow these instructions:
l
Read this manual and all labels carefully
and follow the operating procedures de-
scribed.
l
Never operate an ATV without proper in-
struction.
l
Always follow the age recommendation:
– A child under 16 years old should never
operate an ATV with engine size greater
than 90cc.

2-17
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WARNING

l
Always turn off the engine when refuel-
ing.
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Do not refuel right after the engine has
been running and is still very hot.
l
Do not spill gasoline on the engine or ex-
haust pipe/muffler when refueling. Never
refuel while smoking, or while in the vi-
cinity of sparks, open flames, or other
sources of ignition such as the pilot lights
of water heaters and clothes dryers. Gas-
oline can catch fire and you could be
burned.
l
When transporting the machine in anoth-
er 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.
l
Gasoline is poisonous. If you should swal-
low some gasoline or inhale a lot of gaso-
line vapor, or get some gasoline in your
eyes, see your doctor immediately. If gas-
oline spills on your skin, wash with soap
and water. If gasoline spills on your cloth-
ing, change your clothes.

2-19
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WARNING

Always operate your machine in an area with
adequate ventilation. Never start or run the
engine in a closed area. Exhaust fumes are poi-
sonous and may cause loss of consciousness
and death within a short time.

4-1
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CONTROL FUNCTIONS
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Main switch
Functions of the respective switch positions
are as follows:
ON:
Engine can be started only at this position and
the headlight and taillight come on when the
light switch is on.
OFF:
All electrical circuits are switched off. The key
can be removed in this position.

4-5
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1. Lights switch “LIGHTS”
2. Engine stop switch “ENG. STOP”
3. Start switch “START”
1. Contacteur d’éclairage “LIGHTS”
2. Coupe-circuit du moteur “ENG. STOP”
3. Contacteur du démarreur “START”
1. Interruptor de luces “LIGHTS”
2. Interruptor de paro del motor “ENG. STOP”
3. Interruptor de arranque “START”
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Handlebar switches
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Engine stop switch “ENG. STOP”
Make sure that the engine stop switch is in the
“RUN” position. The engine stop switch con-
trols 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 en-
gine stop switch is turned to “OFF”.
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Start switch “START”
The starter motor cranks the engine when this
switch is pushed.
CAUTION:

See the starting instructions on page 6-3 prior
to starting the engine.

4-7
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Light switch “LIGHTS”
Turn the switch to the “LO” position to switch
on the low beam and the taillight.
Turn the switch to the “HI” position to switch
on the high beam and the taillight.
Turn the switch to the “OFF” position to switch
off the headlight and the taillight.
CAUTION:

Do not use the headlight with the engine
turned off for more than thirty minutes. The
battery may discharge to the point that the
starter motor will not operate properly. If this
should happen, remove the battery and re-
charge it.