Yamaha YZ450F(S) Owner's Service Manual page 528

STEERING
EC564101
Bearing and ball race
1. Wash the bearings and ball races with a
solvent.
2. Inspect:
Bearing 1
G
Ball race
G
Pitting/damage → Replace bearings
and ball races as a set.
Install the bearing in the ball races.
Spin the bearings by hand. If the bear-
ings hang up or are not smooth in their
operation in the ball races, replace
bearings and ball races as a set.
EC565000
ASSEMBLY AND INSTALLATION
Under bracket
1. Install:
Bearing (lower) 1
G
NOTE:
Apply the lithium soap base grease on the dust
seal lip and bearing inner circumference.
2. Install:
Ball race
G
Bearing (upper) 1
G
Ball race cover 2
G
NOTE:
Apply the lithium soap base grease on the
bearing and ball race cover lip.
3. Install:
Under bracket 1
G
NOTE:
Apply the lithium soap base grease on the
bearing, the portion a and thread of the steer-
ing shaft.
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CHAS