Yamaha YZ450FP 2023, Owner'S Service Manual

Page: 176 / 388

STEERING HEAD
4-60
EAM30060
REMOVING THE LOWER BRACKET
1. Use a maintenance stand to raise the front
wheel off the ground.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Remove:
•
Ring nut “1”
TIP
Remove the ring nut with the steering nut
wrench “2”.
WARNING
EWA13730
Securely support the lower bracket so that
there is no danger of it falling.
EAM30061
CHECKING THE STEERING HEAD
1. Wash with kerosene:
•
Bearing
• Bearing race
2. Check:
• Bearing
•
Bearing race
Damage/pitting

Replace.
3. Replace:
• Bearing
•
Bearing race
a. Remove the bearing race from the steer-
ing head pipe with a long rod “1” and a
hammer.
b. Remove the bearing race from the lower
bracket with a chisel “2” and a hammer.
c. Install a new bearing race.
NOTICE
ECA14270
If the bearing race is not installed properly,
the steering head pipe could be damaged.
TIP
Always replace the bearing and the bearing race
as a set.
4. Check:
•
Upper bracket
• Lower bracket
(along with the steering stem)
Bends/cracks/damage

Replace.
EAM30062
INSTALLING THE STEERING HEAD
1. Install:
•
Lower bearing “1”
TIP
Apply the lithium-soap-based grease on the dust
seal lip and bearing inner circumference.
Steering nut wrench
90890-01403
Exhaust flange nut wrench
YU-A9472