Yamaha 2009 YFM25RY, Service Manual, Page: 87 / 293

CHASSIS
3-22
ECA4D3F005
Excessive chain slack will overload the
engine and other vital parts; keep the slack
within the specified limits.
e. If the chain slack cannot be adjusted,
replace the sprockets and drive chain as a
set.
f. Tighten the rear axle pinch bolts.
TIP
• Tighten the rear axle pinch bolts in the
proper sequence as shown.
• The chain should be cleaned and lubricated
after every use of the vehicle.
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EAS21440
LUBRICATING THE DRIVE CHAIN
The drive chain consists of many interacting
parts. If the drive chain is not maintained prop-
erly, it will wear out quickly. Therefore, the drive
chain should be serviced, especially when the
vehicle is used in dusty areas.
This vehicle has a drive chain with small rub-
ber O-rings between each side plate. Steam
cleaning, high-pressure washing, certain sol-
vents, and the use of a coarse brush can dam-
age these O-rings. Therefore, use only
kerosene to clean the drive chain. Wipe the
drive chain dry and thoroughly lubricate it with
engine oil or chain lubricant that is suitable for
O-ring chains. Do not use any other lubricants
on the drive chain since they may contain sol-
vents that could damage the O-rings.
EAS29280
CHECKING THE STEERING SYSTEM
1. Place the vehicle on a level surface.
2. Check:
• Steering assembly bushings
Move the handlebar up and down, and
back and forth.
Excessive play
→
Replace the steering
stem bushings.
3. Check:
• Tie-rod ends “1”
Free play
→
Replace the tie-rod end.
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a. Turn the handlebar left until it stops.
b. Move the handlebar slightly to the right and
left.
c. Check for play in the tie-rod ends.
d. Turn the handlebar right until it stops.
e. Move the handlebar slightly to the left and
right.
f. Check for play in the tie-rod ends.
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Rear axle pinch bolt
21 Nm (2.1 m·kg, 15 ft·lb)
Recommended lubricant
Engine oil or chain lubricant
suitable for O-ring chains