Yamaha WR450F(S) Owner's Service Manual page 602

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Bearing and ball race

1. Wash the bearings and ball races with a

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.

ASSEMBLY AND INSTALLATION

Under bracket

Bearing (lower) 1

Apply the lithium soap base grease on the dust

seal lip and bearing inner circumference.

Bearing (upper) 1

Ball race cover 2

Apply the lithium soap base grease on the

bearing and ball race cover lip.

Under bracket 1

Apply the lithium soap base grease on the

bearing and the portion a of the steering

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Wr450f Wr450 fs 2004