2010 YAMAHA YFM350R maintenance

8-28
8
TIPThe brake light switch is properly adjusted when
the brake light comes on just before braking takes
effect.Turn the adjusting nut while holding the brake light
switch in place. To make the brake light come on
earlier, turn the adjusting nut in direction (a). To
make the brake light come on later, turn the adjust-
ing nut in direction (b).
EBU24820Adjusting the clutch lever free play The clutch lever free play must be checked and, if
necessary, adjusted at the intervals specified in the
periodic maintenance and lubrication chart.
The clutch lever free play should measure 5.0–
10.0 mm (0.20–0.39 in) as shown. If the free play
is incorrect, adjust it as follows.
1. Loosen the locknut at the clutch lever.
1. Brake light switch
2. Brake light switch adjusting nut
1. Locknut
2. Clutch lever free play adjusting bolt
3. Clutch lever free play
U1BS60E0.book Page 28 Thursday, April 16, 2009 4:11 PM

8-31
8
TIPThere 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
mark on both drive chain pullers with the alignment
mark on either side of the swingarm for proper
wheel alignment.4. Tighten the locknuts and the axle holding bolts
to the specified torques.
EBU24882Lubricating 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.NOTICEECB00561The drive chain must be lubricated after wash-
ing the ATV or riding in the rain or wet areas.1. Clean the drive chain with kerosene and a
small soft brush. NOTICE: To prevent dam-
aging the O-rings, do not clean the drive
chain with steam cleaners, high-pressure
washers or inappropriate solvents.
[ECB00571]
1. Locknut
2. Drive chain slack adjusting bolt
3. Alignment marks
Tightening torques:
Locknut:
16 Nm (1.6 m·kgf, 11 ft·lbf)
Axle holding bolt (upper):
120 Nm (12.0 m·kgf, 85 ft·lbf)
Axle holding bolt (lower):
73 Nm (7.3 m·kgf, 53 ft·lbf)
U1BS60E0.book Page 31 Thursday, April 16, 2009 4:11 PM

8-34
8 Brake pedal
Shift pedal
EBU24963Checking the wheel hub bearings The front and rear wheel hub 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 hub bear-
ings.EBU24995Lubricating the swingarm pivots The swingarm pivots must be lubricated by a
Yamaha dealer at the intervals specified in the pe-
riodic maintenance and lubrication chart.
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8-35
8
EBU25003Lubricating 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
U1BS60E0.book Page 35 Thursday, April 16, 2009 4:11 PM

8-37
8Right side
EBU25103Lubricating the steering shaft The steering shaft must be lubricated by a Yamaha
dealer at the intervals specified in the periodic
maintenance and lubrication chart.
EBU2522ABattery This model is equipped with a VRLA (Valve Regu-
lated Lead Acid) battery. There is no need to check
the electrolyte or to add distilled water. However,
the battery lead connections need to be checked
and, if necessary, tightened.NOTICEECB00620Never attempt to remove the battery cell seals,
as this would permanently damage the battery.
WARNING
EWB02160Battery electrolyte is poisonous and danger-
ous, as it contains sulfuric acid, which can
cause severe burns. Avoid contact with skin,
eyes or clothing. Always shield your eyes
when working near batteries.
Antidote:
EXTERNAL: Flush with water.
INTERNAL: Drink large quantities of water or
milk. Follow with milk of magnesia, beaten egg
or vegetable oil. Call a physician immediately.
EYES: Flush with water for 15 minutes and get
prompt medical attention.
1. Upper grease nipple
2. Lower grease nippleRecommended lubricant:
Lithium-soap-based grease
U1BS60E0.book Page 37 Thursday, April 16, 2009 4:11 PM

MMain switch .................................................................... 4-1
Maintenance and lubrication chart ................................. 8-5
Maintenance chart, emission control system ................. 8-3
Model label ................................................................... 11-2NNeutral indicator light ..................................................... 4-2OOwner’s manual and tool kit ........................................... 8-1PParking ........................................................................... 6-7
Parking brake free play, adjusting ................................ 8-26
Parking brake lever ........................................................ 4-6
Parking on a slope ......................................................... 6-7
Part locations ................................................................. 3-1RReverse indicator light ................................................... 4-2
Riding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-12
Shifting ........................................................................... 6-4
Shift pedal ...................................................................... 4-7
Shock absorber assemblies, adjusting the front .......... 4-13
Shock absorber assembly, adjusting the rear .............. 4-14
Spark arrester, cleaning ............................................... 8-18
Spark plug, checking ...................................................... 8-9
Specifications ............................................................... 10-1
Speed limiter .................................................................. 4-3
Starter (choke) ............................................................. 4-11
Start switch .................................................................... 4-3
Steering shaft, lubricating ............................................ 8-37Storage .......................................................................... 9-2
Suspension, lubricating the upper and lower arm
pivots ......................................................................... 8-36
Suspension relay arm and connecting arm pivoting
points, lubricating the rear ......................................... 8-35
Swingarm pivots, lubricating ........................................ 8-34
TTail/brake light bulb, replacing ..................................... 8-43
Throttle cable free play, adjusting ................................ 8-21
Throttle lever ........................................................... 4-3, 5-3
Tires ............................................................................... 5-4
Troubleshooting ........................................................... 8-44
Troubleshooting chart .................................................. 8-46VValve clearance ........................................................... 8-22
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-34
Wheel, installing ........................................................... 8-44
Wheel, removing .......................................................... 8-43
U1BS60E0.book Page 2 Thursday, April 16, 2009 4:11 PM