2008 YAMAHA YFM350R-W Owners Manual

8-27
8 2. To increase the clutch lever free play, turn the
adjusting bolt at the clutch lever in direction
(a), and to decrease it, turn the bolt in direction
(b).
3. Tighten the locknut at the clutch lever.
If the specified free play cannot be obtained,
proceed with the following steps.
4. Loosen the locknut at the clutch lever.
5. Fully turn the adjusting bolt at the clutch lever
in direction (a) to loosen the clutch cable.
6. Loosen the locknut at the crankcase.
7. To increase the clutch lever free play, turn the
adjusting nut at the crankcase in direction (a),
and to decrease it, turn the nut in direction (b).8. Tighten the locknut at the crankcase and the
clutch lever.
NOTE:If the specified free play cannot be obtained as de-
scribed above or if the clutch does not operate cor-
rectly, have a Yamaha dealer check the internalclutch mechanism.EBU28142Drive chain slack The drive chain slack should be checked before
each ride and adjusted if necessary.
To check the drive chain slack
1. Place the ATV on a level surface.NOTE:When checking and adjusting the drive chain
slack, there should be no weight on the ATV andall tires must be touching the ground.
2. Move the ATV back and forth to locate the
tightest portion of the drive chain, and then
measure the drive chain slack as shown.
1. Locknut
2. Clutch lever free play adjusting nut (crankcase)
Drive chain slack:
25.0–35.0 mm (0.98–1.38 in)
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8-28
83. If the drive chain slack is incorrect, adjust it as
follows.
To adjust the drive chain slack
1. Loosen the axle holding nuts.2. Loosen the locknut on each side of the swing-
arm. To tighten the drive chain, turn the ad-
justing bolts in direction (a). To loosen the
drive chain, turn the adjusting bolts in direction
(b) and push the wheels forward. Turn each
adjusting bolt exactly the same amount to
maintain correct axle alignment.
NOTE:There are alignment marks on both drive chain
pullers and an alignment mark on each side of the
swingarm. Make sure to align the same alignment
1. Drive chain slack
1. Axle holding nut (upper)
2. Axle holding nut (lower)
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8-29
8 mark on both drive chain pullers with the alignment
mark on either side of the swingarm for proper
wheel alignment.CAUTION:ECB00541Improper drive chain slack will overload the en-
gine as well as other vital parts of the ATV and
can lead to drive chain slippage or breakage.
To prevent this from occurring, keep the drivechain slack within the specified limits.3. Tighten the locknuts and the axle holding nuts
to the specified torques.
NOTE:Make sure that the curved edge of the speed sen-
sor bracket touches the rear wheel hub when tight-ening the axle holding nuts.
1. Locknut
2. Drive chain slack adjusting bolt
3. Alignment marks
1. Speed sensor bracket
2. Rear wheel hub
3. Curved edge
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8-30
8
EBU24880Lubricating the drive chain The drive chain must be cleaned and lubricated at
the intervals specified in the periodic maintenance
and lubrication chart, otherwise it will quickly wear
out, especially when riding in dusty or wet areas.
Service the drive chain as follows.
CAUTION:ECB00560The drive chain must be lubricated after wash-ing the ATV or riding in the rain.
1. Clean the drive chain with kerosene and a
small soft brush.CAUTION:ECB00570To prevent damaging the O-rings, do not clean
the drive chain with steam cleaners, high-pres-sure washers or inappropriate solvents.
2. Wipe the drive chain dry.
3. Thoroughly lubricate the drive chain with a
special O-ring chain lubricant.CAUTION:ECB00580Do not use engine oil or any other lubricants
for the drive chain, as they may contain sub-stances that could damage the O-rings.EBU24900Checking and lubricating the cables The operation and the condition of all control ca-
bles should be checked before each ride, and the
cables and cable ends should be lubricated if nec- Tightening torques:
Locknut:
16 Nm (1.6 m·kgf, 11 ft·lbf)
Axle holding nut (upper):
120 Nm (12.0 m·kgf, 85 ft·lbf)
Axle holding nut (lower):
73 Nm (7.3 m·kgf, 53 ft·lbf)
1. O-ringU10P60E0.book Page 30 Thursday, June 15, 2006 4:19 PM

8-31
8 essary. If a cable is damaged or does not move
smoothly, have a Yamaha dealer check or replace
it.
WARNING
EWB02130Inspect cables frequently and replace if dam-
aged. Corrosion can result when the cable
sheaths become damaged, and cables can
also become frayed or kinked, which could re-
strict the operation of controls and lead to anaccident or injury.EBU24920Checking and lubricating the brake and
clutch levers The operation of the brake and clutch levers
should be checked before each ride, and the lever
pivots should be lubricated if necessary.Brake lever
Clutch lever Recommended lubricant:
Engine oil
Recommended lubricant:
Lithium-soap-based grease (all-purpose
grease)U10P60E0.book Page 31 Thursday, June 15, 2006 4:19 PM

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8
EBU24930Checking and lubricating the brake and
shift pedals The operation of the brake and shift pedals should
be checked before each ride, and the pedal pivots
should be lubricated if necessary.
Brake pedalShift pedal
EBU24961Checking the wheel bearings The front and rear wheel bearings must be
checked at the intervals specified in the periodic
maintenance and lubrication chart. If there is play
in a wheel hub or if a wheel does not turn smoothly,
have a Yamaha dealer check the wheel bearings.EBU24992Lubricating the swingarm pivots The swingarm pivots must be lubricated at the in-
tervals specified in the periodic maintenance and
lubrication chart. Recommended lubricant:
Lithium-soap-based grease (all-purpose
grease)
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8
EBU25001Lubricating the rear suspension relay
arm and connecting arm pivoting
points The rear suspension relay arm and connecting
arm pivoting points must be lubricated at the inter-
vals specified in the periodic maintenance and lu-
brication chart.
Lubricate the pivoting points using a grease gun.Recommended lubricant:
Lithium-soap-based grease
Recommended lubricant:
Lithium-soap-based grease
1. Grease nipple
1. Grease nipple
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8
EBU25030Lubricating the upper and lower arm
pivots The upper and lower arm pivots must be lubricated
at the intervals specified in the periodic mainte-
nance and lubrication chart.
Lubricate the pivoting points using a grease gun.Left side1. Grease nippleRecommended lubricant:
Lithium-soap-based grease
1. Upper grease nipple
2. Lower grease nipple
U10P60E0.book Page 34 Thursday, June 15, 2006 4:19 PM