Yamaha WR450FB 2012 Owner's Service Manual page 112

e. Tighten the wheel axle nut.
~
Wheel axle nut
~
125 Nm (12.5 m·kgf, 90 ft-lbf)
EAS10X3108
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 rubber
0-rings between each side plate. Steam clean-
ing, high-pressure washing, certain solvents,
and the use of a coarse brush can damage
these 0-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 0-ring chains.
Do not use any other lubricants on the drive
chain since they may contain solvents that
could damage the 0-rings.
Recommended lubricant
- t Chain lubricant suitable for C-
ring chains
EAS1DX3109
CHECKING AND ADJUSTING THE STEER-
ING HEAD
1. Stand the vehicle on a level surface.
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
TIP _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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 f rant fork.
Blinding/looseness
~
Adjust the steering
head.
3. Remove:
•Handlebar
Refer to "HANDLEBAR" on page 5-38.
• Upper bracket ·
Refer to "STEERING HEAD" on page 5-58.
4. Adjust:
• Steering head
PERIODIC MAINTENANCE
TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT
a. Remove the collar "1
11
and the washer "2
11
•
b. Tighten the ring nut "3" with a steering nut
wrench "4".
TIP _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
• Set the torque wrench at a right angle to the
steering nut wrench.
• Move the steering to the left and right a couple
of times to check that it moves smoothly.
~
Steering nut wrench
90890-01403
VU-A9472
~
Ring nut (initial tightening torque)
38 Nm (3.8 m·kgf, 27 ft-lbf)
c. Turn the front fork to the right and left a few
times, and make sure that the steering ro-
tates smoothly. If it does .not turn smoothly,
remove the lower bracket and inspect the
upper and lower bearings.
3-24
Refer to "STEERING HEAD" on page 5-58.
d. Loosen the ring nut "3
11
fully turn and then
tighten it to specification with a steering nut
wrench.
EWA13140
j \
WARNING
Do not overtighten the ring nut.
Ring nut {final tightening torque)
7 Nm (0.7 m·kgf, 5.1 ft-lbf)