Inspection; Installation - Yamaha YTZ250S 1986 Service Manual

8. Support the steering stem, and remove
the ring nut, ball race cover, ball race,
and balls.
Ball quantity:
Upper: 19 pcs (114 in)
Inspection
Examine all the balls for pits or partial flatness.
If anyone is found defective, the entire set
(including both races) should be replaced. If
either race is pitted, shows rust spots, or is
damaged in any way, replace both races and
all balls.
Installation
1. If pressed-in races have been removed,
tap in new races.
2. Grease the lower bearing of the under
bracket.
4-19
3. Grease the lower ball race of the upper
bearing and arrange the balls around it.
Then apply more grease and set the top
race into place.
NOTE: ______________________ _
Use medium-weight wheel bearing grease of
quality manufacture, preferably waterproof.
4. Carefully slip the under bracket stem up
into the steering head. Hold the top bear-
ing assembly in place so the stem does
not knock any balls out of position.
5. Set the upper bearing cover on and in-
stall the ring nut. Tighten the ring nut ap-
proximately 45 Nm (4.5 m·kg, 32 ft·lb)
and loosen it approximately 114 turn.
Recheck for free play after the entire fork
unit has been installed.
6. Install steering crown and tighten steer-
ing stem nut.
Steering stem nut:
85 Nm (8.5 m'kg, 61 ft·lb)