2001 YAMAHA WARRIOR 350 engine

5-1
Yuki_Data:Yuki_data:Yuki:Yuki_1:ATV:HM00B067_YFM350X-60:YFM350-5.frame
EL
EBU00113
PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Brake
• Check operation, free play, fluid level and fluid leakage.
• Fill with DOT 4 (or DOT 3) brake fluid if necessary.5-5 ~ 5-7,
8-39 ~ 8-49
Clutch
• Check operation, condition and lever free play. 8-55
Parking brake
• Check operation, condition and cable slack. 8-51 ~ 8-53
Fuel
• Check fuel level.
• Fill with fuel if necessary.5-9 ~ 5-11
Engine oil
• Check oil level.
• Fill with oil if necessary.5-13 ~ 5-15,
8-15 ~ 8-23
Drive chain
• Check chain slack and condition.
• Adjust if necessary.5-15, 8-57 ~ 8-61
Throttle
• Check for proper throttle cable operation. 5-17, 8-37
Wheels and tires
• Check tire pressure, wear and damage.5-19 ~ 5-25,
8-69 ~ 8-71
Fittings and Fasteners
• Check all fittings and fasteners. 5-17
Lights
• Check for proper operation. 5-17, 8-83 ~ 8-89
Battery
• Check fluid level.
• Fill with distilled water if necessary.5-19, 8-73 ~ 8-79

5-11
Yuki_Data:Yuki_data:Yuki:Yuki_1:ATV:HM00B067_YFM350X-60:YFM350-5.frame
EL
1. Filler tube 2. Fuel level
1. Tube de remplissage 2. Niveau de carburant
1. Tubo de llenado 2. Nivel de combustible
WARNING

l
Do not overfill the fuel tank. Fuel expands
when it heats up. If the fuel tank is over-
filled, fuel could spill out due to heat from
the engine or the sun.
l
Be careful not to spill fuel, especially on
the engine or exhaust pipe which can
cause a fire and severe injury. Wipe up
any spilled fuel immediately.
l
Do not refuel right after the engine has
been running and is still very hot.
l
Be sure the fuel tank cap is closed secure-
ly.

5-13
Yuki_Data:Yuki_data:Yuki:Yuki_1:ATV:HM00B067_YFM350X-60:YFM350-5.frame
EL
EBU00485
Engine oil
Make sure the engine oil is at the specified lev-
el. Fill with oil as necessary. (See pages 8-15 ~
8-23 for details.)
Temp.
-20°
-10°0°10°20°30°40°
50°C
5W/30
10W/30
10W/40
20W/50
15W/4020W/40

Recommended oil:
Recommended engine oil classification:
API Service SE, SF, SG type or higher

5-15
Yuki_Data:Yuki_data:Yuki:Yuki_1:ATV:HM00B067_YFM350X-60:YFM350-5.frame
EL
CAUTION:

Be sure to use motor oils that do not contain
anti-friction modifiers. Passenger car motor
oils (often labeled “Energy Conserving”) con-
tain anti-friction additives which will cause
clutch and/or starter clutch slippage, resulting
in reduced component life and poor engine
performance.
EBU00498
Chain
Check the general condition of the chain and
check the chain slack before every ride. Lubri-
cate and adjust the chain as necessary. (See
pages 8-57 ~ 8-61 for details.)Oil quantity:
Total amount:
3.2 L
Periodic oil change:
2.4 L
With oil filter replacement:
2.5 L

5-17
Yuki_Data:Yuki_data:Yuki:Yuki_1:ATV:HM00B067_YFM350X-60:YFM350-5.frame
EL
EBU00151
Throttle lever
Check to see that the throttle lever operates
correctly. It must open smoothly and spring
back to idle position when released. Repair as
necessary for proper operation.
EBU00152
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 Man-
ual for correct tightening torque.
EBU00153
Lights
Check the headlight and taillight to make sure
they are in working condition. Repair as neces-
sary for proper operation.
EBU00155
Switches
Check the operation of the headlight switch,
engine stop switch and any other switches. Re-
pair as necessary for proper operation.

6-3
Yuki_Data:Yuki_data:Yuki:Yuki_1:ATV:HM00B067_YFM350X-60:YFM350-6.frame
EL
EBU00514
Starting a cold engine
WARNING

Always make sure all control cables work
smoothly before you begin riding in cold
weather. If the control cables are frozen or do
not work smoothly, you could be unable to
control the ATV, which could lead to an acci-
dent or collision.
1. Set the parking brake.
2. Turn the fuel cock to “ON”.
3. Turn the main switch to “ON” and the en-
gine stop switch to “RUN”.
4. Shift the transmission into neutral.

6-5
Yuki_Data:Yuki_data:Yuki:Yuki_1:ATV:HM00B067_YFM350X-60:YFM350-6.frame
EL
a. Starter (choke) 1. Fully open
2. Half open 3. Closed
a. Starter (enrichisseur) 1. Complètement ouvert
2. Mi-ouvert 3. Fermé
a. Starter (choke) 1. Abre completamente
2. Semiabierto 3. Cerrado
NOTE:

This model is equipped with an ignition circuit
cut-off system. The engine can be started un-
der 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 clutch is disengaged with the
transmission and drive select lever in any
position. However, it is recommended to
shift into neutral before starting the en-
gine.
5. Use the starter (choke) in reference to the
figure:
Position
1
: Cold engine start-
ambient temperature below 5 ˚C
Position
2
: Cold engine start-
ambient temperature at 0 ˚C ~
30 ˚C and warming up position.
Position
3
: Cold engine start-
ambient temperature above 25 ˚C
and warm engine start position.

6-7
Yuki_Data:Yuki_data:Yuki:Yuki_1:ATV:HM00B067_YFM350X-60:YFM350-6.frame
EL
6. Completely close the throttle lever and
start the engine by pushing the start
switch.
NOTE:

If the engine fails to start, release the start
switch, then push it again. Pause a few sec-
onds before the next attempt. Each cranking
should be as short as possible to preserve bat-
tery energy. Do not crank the engine more than
10 seconds on each attempt.
7. If the engine is started with the starter
(choke) in position
1
, the starter (choke)
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.
8. Continue warming up the engine until it
idles smoothly and return the starter
(choke) to position
3
before riding.
CAUTION:

See the “Engine break-in” section prior to op-
erating engine for the first time.