Yamaha YZ450FA Automobile User Manual


 
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CHASSIS
CHECKING THE WHEELS
1. Inspect:
• Wheel runout
Elevate the wheel and turn it.
Abnormal runout Replace.
2. Inspect:
• Bearing free play
Exist play Replace.
CHECKING AND ADJUSTING THE
STEERING HEAD
1. Place a stand under the engine to raise the
front wheel off the ground. WARNING! Se-
curely support the vehicle so that there is
no danger of it falling over.
2. Check:
• Steering stem
Grasp the bottom of the forks and gently
rock the fork assembly back and forth.
Free play Adjust steering head.
3. Check:
• Steering smooth action
Turn the handlebar lock to lock.
Unsmooth action Adjust steering ring nut.
4. Adjust:
• Steering ring nut
Steering ring nut adjustment steps:
a. Remove the number plate.
b. Remove the handlebar and upper bracket.
c. Loosen the steering ring nut "1" using the
steering nut wrench "2".
d. Tighten the steering ring nut "3" using steer-
ing nut wrench "4".
• Apply the lithium soap base grease on the
thread of the steering stem.
• Set the torque wrench to the steering nut
wrench so that they form a right angle.
Spokes:
3 Nm (0.3 m•kg, 2.2 ft•lb)
Steering nut wrench:
YU-33975/90890-01403
Steering nut wrench:
YU-33975/90890-01403
Steering ring nut (initial tightening):
38 Nm (3.8 m•kg, 27 ft•lb)