Yamaha WR450F(R) Owner's Service Manual page 270

STEERING HEAD INSPECTION AND ADJUSTMENT
2. Inspect:
Bearing free play
G
Exist play → Replace.
STEERING HEAD INSPECTION AND
ADJUSTMENT
1. Elevate the front wheel by placing a suit-
able stand under the engine.
2. Check:
Steering shaft
G
Grasp the bottom of the forks and gen-
tly rock the fork assembly back and
forth.
Free play → Adjust steering head.
3. Check:
Steering smooth action
G
Turn the handlebar lock to lock.
Unsmooth action → Adjust steering ring
nut.
4. Adjust:
Steering ring nut
G
Steering ring nut adjustment steps:
Remove the headlight.
G
Remove the handlebar and handle crown.
G
Loosen the ring nut 1 using the ring nut
G
wrench 2.
Ring nut wrench:
YU-33975/90890-01403
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INSP
ADJ