2003 YAMAHA WARRIOR 350 clutch

7-35
With the engine idling, pull the clutch lever to dis-
engage the clutch and shift into 1st gear, and then
release the parking brake. Open the throttle grad-
ually, and at the same time, release the clutch le-
ver slowly. Once the ATV has attained adequate
speed, release the throttle lever and at same time,
quickly pull in the clutch lever and shift into 2nd
gear. Open the throttle part way and gradually re-
lease the clutch. Use this same procedure as you
move into the higher 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 operation of your
ATV.
WARNING
_ Always open the throttle gradually and release
the clutch lever slowly. Otherwise, the ATV
could wheelie which would increase the
chance of an accident. _
U5NF61.book Page 35 Wednesday, June 13, 2001 5:18 PM

8-7
EBU00262
3-PERIODIC MAINTENANCE/LUBRICATION
ITEM ROUTINEINITIAL EVERY
1
month3
months6
months6
months1
year
Valves*•Check valve clearance.
•Adjust if necessary.
Spark plug•Check condition.
•Adjust gap and clean.
•Replace if necessary.Air filter element•Clean.
•Replace if necessary.Every 20~40 hours
(More often in wet or dusty areas.)
Carburetor*•Check idle speed/starter operation.
•Adjust if necessary.Crankcase breather
system*•Check breather hose for cracks or damage.
•Replace if necessary.Exhaust system*•Check for leakage.
•Tighten if necessary.
•Replace gasket(s) if necessary.Fuel line*•Check fuel hose for cracks or damage.
•Replace if necessary.Engine oil•Replace. (Warm engine before draining.)Engine oil filter element•Clean.
•Replace if necessary.Engine oil strainer•Clean.Drive chain•Check and adjust slack/alignment/clean/lube.Brakes*•Check operation/fluid leakage/See NOTE page 8-8.
•Correct if necessary.Clutch*•Check operation.
•Adjust if necessary.Wheels*•Check balance/damage/runout.
•Replace if necessary.U5NF61.book Page 7 Wednesday, June 13, 2001 5:18 PM

8-51 1. Locknut 2. Adjusting bolt
1. Contre-écrou 2. Boulon de réglage
1. Contratuerca 2. Perno de ajuste
1. Locknut 2. Adjusting bolt
1. Contre-écrou 2. Boulon de réglage
1. Contratuerca 2. Perno de ajuste
EBU00953
Parking brake adjustment
Parking brake adjustment may be required if the
parking brake does not hold properly.
1. Fully loosen the parking brake cable adjust-
ing bolt locknut and the adjusting bolt on the
clutch lever.
2. Loosen the adjusting bolt locknut and the ad-
justing bolt on the rear brake caliper.
3. Turn the adjusting bolt on the clutch lever so
that cable length
a is 46 ~ 50 mm.NOTE:If the cable cannot be adjusted to specification,
consult a Yamaha dealer. _
U5NF61.book Page 51 Wednesday, June 13, 2001 5:18 PM

8-53 a. Cable length (46 ~ 50 mm)
a. Longueur de câble (46 à 50 mm)
a. Longitud del cable (46 ~ 50 mm)
4. Tighten the adjusting bolt locknut on the
clutch lever.
5. Screw in the adjusting bolt on the brake cali-
per by hand until it feels tight, then screw it
out 1/8 turn. Tighten the adjusting bolt locknut
to the specified torque.CAUTION:_ When tightening the locknut, hold the adjust-
ing bolt with a wrench so that the adjusting
bolt does not turn together with the locknut. _
WARNING
_ Operating with improperly adjusted brakes
could cause the brakes to malfunction, result-
ing in reduced braking performance. This
could increase the chance of a collision or ac-
cident. After adjusting the parking brake, block
the rear of the machine off the ground and spin
the rear wheels. Check to make sure there is
no brake drag. If brake drag is noticed, perform
the adjustment again. _
Tightening torque:
Locknut:
16 Nm (1.6 m·kgf)
U5NF61.book Page 53 Wednesday, June 13, 2001 5:18 PM

8-57 1. Locknut 2. Adjusting bolt A. 5 ~ 10 mm
1. Contre-écrou 2. Boulon de réglage
1. Contratuerca 2. Perno de ajuste
1. Locknut 2. Adjusting nut
1. Contre-écrou 2.Écrou de réglage
1. Contratuerca 2. Tuerca de ajuste
EBU00741
Clutch lever free play adjustment
The clutch lever free play should be adjusted to 5 ~
10 mm.
1. Loosen the locknut at the clutch lever.
2. Turn the adjusting bolt at the clutch lever in
direction
a to increase the free play or in di-
rection
b to decrease the free play.
3. Tighten the locknut at the clutch lever.NOTE:If the specified free play cannot be obtained, pro-
ceed with the following steps.4. Loosen the locknut at the clutch lever.
5. Turn the adjusting bolt at the clutch lever in
direction
a to loosen the cable.
6. Loosen the locknut at the crankcase side.
7. Turn the adjusting nut at the crankcase in di-
rection
a to increase the free play or in direc-
tion
b to decrease the free play.
8. Tighten the locknut at the crankcase and the
clutch lever.
U5NF61.book Page 57 Wednesday, June 13, 2001 5:18 PM

8-65
EBU00570
Cable inspection and lubrication
WARNING
Inspect cables frequently and replace if dam-
aged. Corrosion can result when the outer cov-
ering of control cables becomes damaged.
Cables can also become frayed or kinked. Op-
eration of controls could be restricted, which
could cause an accident or injury.Lubricate the inner cables and the cable ends. If
the cables do not operate smoothly, ask a Yamaha
dealer to replace them.
EBU00737
Brake and shift pedal/brake and clutch lever lu-
brication
Lubricate the pivoting parts of each lever and pedal.Recommended lubricant:
Engine oil
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
U5NF61.book Page 65 Wednesday, June 13, 2001 5:18 PM

10-2
10
Engine oil:
Type
Recommended engine oil classification: API Service SE, SF, SG type or higherMODEL YFM350X
-20˚-10˚0˚
10˚20˚30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
CAUTION:
Be sure to use motor oils that do not contain anti-
friction modifiers. Passenger car motor oils (often
labeled “ENERGY CONSERVING II”) contain anti-
friction additives which will cause clutch and/or
starter clutch slippage, resulting in reduced com-
ponent life and poor engine performance.
U5NF61.book Page 2 Wednesday, June 13, 2001 5:18 PM

10-3
Quantity:
Periodic oil change (engine oil)
Periodic oil change
(engine oil with oil filter replacement)
Total amount2.4 L
2.5 L
3.2 L
Air filter: Wet type element
Fuel:
Type
Tank capacity
Reserve amountREGULAR UNLEADED GASOLINE ONLY
9.0 L
1.9 L
Carburetor:
Type/manufacturer BTM36SH / MIKUNI
Spark plug:
Type/manufacturer
GapDR8EA / NGK
0.6 ~ 0.7 mm
Clutch:
Type
OperationWet, Multiple-disc
Left hand operation
Transmission:
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Transmission type
OperationSpur gear
76/24 (3.166)
Chain drive
40/13 (3.076)
Constant mesh, 6-speed forward, 1-speed reverse
Left foot operation MODEL YFM350X
U5NF61.book Page 3 Wednesday, June 13, 2001 5:18 PM