Yamaha TT-R125(M) Owner's Service Manual page 172

STEERING HEAD INSPECTION AND ADJUSTMENT
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 number plate and starter
knob.
Remove the handlebar and upper bracket.
Remove the special washer 1
Remove the upper ring nut 2, and rubber
washer 3.
Loosen the lower ring nut 4 using the
steering nut wrench 5.
Steering nut wrench:
YU-33975/90890-01403
Tighten the lower ring nut 6 using steer-
ing nut wrench 7 and turn the steering
right and left a few times.
NOTE:
Set the torque wrench to the steering nut
wrench so that they form a right angle.
Steering nut wrench:
YU-33975/90890-01403
Lower ring nut (initial tightening):
38 Nm (3.8 m • kg, 27 ft • lb)
Loosen the lower ring nut one turn.
Retighten the lower ring nut using the
steering nut wrench.
WARNING
Avoid over-tightening.
3 - 22
INSP
ADJ
Adjust steering ring