Wheel Bearings - Yamaha YTZ250S 1986 Service Manual

3. If the steering head is loose, adjust it.
Remove the pinch bolts of the steering
crown and loosen the steering stem nut.
1. Steering stem nut
4. Use a ring nut wrench to tighten the
steering ring nut until the steering head
is tight but does not bind when the forks
are turned.
1. Steering ring nut 2. Ring nut wrench
5. Tighten the pinch bolts and steering
stem nut to specification.
TIGHTENING TORQUE:
Steering stem nut:
85 Nm (8.5 m·kg, 61 ft·lb)
Steering crown pinch bolt:
40 Nm (4.0 m·kg, 29 ft·lb)
6. Recheck steering adjustment to make
sure there is no binding when the forks
are moved from lock to lock. If
necessary, repeat the adjustment
procedure.
2-13
Wheel Bearings
If a rolling rumble is noticed and increases
with increasing wheel speed (not engine or
transmission speed), the wheel bearings may
be worn. Check the wheel bearings for both
the front and rear wheels.
Front wheel
1. Oil seal
2. Bearing
Tire pressure (Cold) :
24.5
kPa
(0.25
kg / cm 2 ,
3.56
psi)
Rim size:
6.5 x 12
Rim runout limit:
2 mm
(0.08
in)
1. Raise the front end of the machine, and
spin the wheel by hand. Touch the axle
of front fender while spinning the wheel.
If you feel any excessive vibration, the
bearings are rough and should be
replaced.