Lubricating The Drive Chain; Checking And Adjusting The Steering Head - Yamaha YZF-R125 Service Manual

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d. Tighten the wheel axle nut to specification.
Wheel axle nut
85 Nm (8.5 m·kg, 61 ft·lb)
e. Tighten the locknuts to specification.
Drive chain adjusting locknut
16 Nm (1.6 m·kg, 11 ft·lb)
L LLL L LLL L L LLL L
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.
Recommended lubricant
Engine oil or chain lubricant
suitable for O-ring chains
EAS21510
CHECKING AND ADJUSTING THE
STEERING HEAD
1. Stand the vehicle on a level surface.
EWA13120
WARNING
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.
L LLL L L LLL L L LLL L
4. Adjust:
• Steering head
M MMM M MMM M
a. Remove the lock washer "1", the upper ring
nut "2", and the rubber washer "3".
LLL
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.
EWA13140
WARNING
Do not overtighten the lower ring nut.
3-22
M MMM M M MMM M M MMM M
Steering nut wrench
90890-01403
Spanner wrench
YU-33975
Lower ring nut (initial tightening
torque)
48 Nm (4.8 m·kg, 35 ft·lb)
Lower ring nut (final tightening
torque)
13 Nm (1.3 m·kg, 9.4 ft·lb)
CHASSIS
M MMM M MMM