Yamaha YZF-R125, Service Manual

Page: 95 / 356

CHASSIS
3-22
d. Tighten the wheel axle nut to specification.
e. Tighten the locknuts to specification.
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EAS21440
LUBRICATING THE DRIVE CHAIN
The drive chain consists of many interacting
parts. If the drive chain is not maintained proper-
ly, 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 rubber
O-rings between each side plate. Steam clean-
ing, high-pressure washing, certain solvents,
and the use of a coarse brush can damage
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 solvents that could
damage the O-rings.
EAS21510
CHECKING AND ADJUSTING THE
STEERING HEAD
1. Stand the vehicle on a level surface.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
NOTE:
Place the vehicle on a suitable stand so that the
front wheel is elevated.
2. Check:
• Steering head
Grasp the bottom of the front fork legs and
gently rock the front fork.
Binding/looseness
→
Adjust the steering
head.
3. Remove:
• Upper bracket
Refer to “STEERING HEAD” on page 4-52.
4. Adjust:
• Steering head
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a. Remove the lock washer “1”, the upper ring
nut “2”, and the rubber washer “3”.
b. Tighten the lower ring nut “4” with a steering
nut wrench “5”.
NOTE:
Set the torque wrench at a right angle to the
steering nut wrench.
c. Loosen the lower ring nut “4” completely, and
then tighten it to specification with a steering
nut wrench.
WARNING
EWA13140
Do not overtighten the lower ring nut.
T
R
.
.
Wheel axle nut
85 Nm (8.5 m·kg, 61 ft·lb)
T
R
.
.
Drive chain adjusting locknut
16 Nm (1.6 m·kg, 11 ft·lb)
Recommended lubricant
Engine oil or chain lubricant
suitable for O-ring chains
Steering nut wrench
90890-01403
Spanner wrench
YU-33975
T
R
.
.
Lower ring nut (initial tightening
torque)
48 Nm (4.8 m·kg, 35 ft·lb)
T
R
.
.
Lower ring nut (final tightening
torque)
13 Nm (1.3 m·kg, 9.4 ft·lb)
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