Yamaha TTR90(M) Owner's Service Manual page 140

STEERING HEAD INSPECTION AND ADJUSTMENT
3
5
2
4
3. Check:
Steering smooth action
Turn the handlebar lock to lock.
Unsmooth action
nut.
4. Adjust:
Steering ring nut
Steering ring nut adjustment steps:
Remove the front fender 1.
Remove the handlebar and handle crown.
Loosen the ring nut 2 using the ring nut
wrench 3.
Ring nut wrench:
YU-01268/90890-01268
Tighten the ring nut 4 using ring nut
wrench 5.
NOTE:
Set the torque wrench to the ring nut
wrench so that they form a right angle.
Ring nut wrench:
YM-33975/90890-01403
Ring nut (initial tightening):
38 Nm (3.8 m • kg, 27 ft • lb)
Loosen the ring nut one turn.
Retighten the ring nut using the ring nut
wrench.
WARNING
Avoid over-tightening.
Ring nut (final tightening):
1 Nm (0.1 m • kg, 0.7 ft • lb)
Check the steering shaft by turning it lock
to lock. If there is any binding, remove the
steering shaft assembly and inspect the
steering bearings.
Install the handle crown 6, handlebar 7,
and front fender.
3 - 16
INSP
ADJ
Adjust steering ring