Yamaha TT-R90(S) Owner's Service Manual page 158

STEERING HEAD INSPECTION AND ADJUSTMENT
3
5
2
4
3. Check:
Steering smooth action
G
Turn the handlebar lock to lock.
Unsmooth action → Adjust steering ring
nut.
4. Adjust:
TT-R90
Steering ring nut
G
Steering ring nut adjustment steps:
Remove the front fender 1.
G
Remove the handlebar and handle crown.
G
Loosen the ring nut 2 using the ring nut
G
wrench 3.
Ring nut wrench:
YU-1268/90890-01268
Tighten the ring nut 4 using ring nut
G
wrench 5 and turn the steering right and
left a few times.
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.
G
Retighten the ring nut using the ring nut
G
wrench.
WARNING
Avoid over-tightening.
Ring nut (final tightening):
1 Nm (0.1 m • kg, 0.7 ft • lb)
3 - 16
INSP
ADJ