2001 YAMAHA TTR90 steering

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INSP
ADJ
STEERING HEAD INSPECTION AND ADJUSTMENT
3. Check:
lSteering smooth action
Turn the handlebar lock to lock.
Unsmooth action ® Adjust steering ring
nut.
4. Adjust:
lSteering ring nut
Steering ring nut adjustment steps:
lRemove the front fender 1.
lRemove the handlebar and handle crown.
lLoosen the ring nut 2 using the ring nut
wrench 3.
Ring nut wrench:
YU-1268/90890-01268
lTighten the ring nut 4 using ring nut
wrench 5 and turn the steering right and
left a few times.
Ring nut wrench:
YM-33975/90890-01403
T R..
Ring nut (initial tightening):
38 Nm (3.8 m • kg, 27 ft • lb)
lLoosen the ring nut one turn.
lRetighten the ring nut using the ring nut
wrench.
T R..
Ring nut (final tightening):
1 Nm (0.1 m • kg, 0.7 ft • lb)
lCheck the steering shaft by turning it lock
to lock. If there is any binding, remove the
steering shaft assembly and inspect the
steering bearings.
lInstall the handle crown 6, handlebar 7,
and front fender.
2 3
5
4
NOTE:
Set the torque wrench to the ring nut
wrench so that they form a right angle.
WARNING
Avoid over-tightening.

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INSP
ADJ
STEERING HEAD INSPECTION AND ADJUSTMENT
T R..
Steering stem bolt:
40 Nm (4.0 m • kg, 2.9 ft • lb)
Front fork cap bolt:
40 Nm (4.0 m • kg, 2.9 ft • lb)
Handlebar upper holder:
13 Nm (1.3 m • kg, 9.4 ft • lb)
CAUTION:
Install the handlebar holder with its
groove a facing outward, and tighten
the bolts so that the gaps b are equal.
a
bb

5 - 10
CHAS

STEERING
EC560000
STEERING
LS
LS
T R..TIGHTENING STEPS:
•Tighten ring nut.
38 Nm (3.8 m • kg, 27 ft • Ib)
•Loosen it completly
•Retighten it.
1 Nm (0.1 m • kg, 0.7 ft • Ib)
T R..40 Nm (4.0 m • kg, 29 ft • Ib)
5 9681076 43
21

Extent of removal:
1
Under bracket removal
2
Bearing removal
Extent of removal Order Part name Q’ty Remarks
STEERING REMOVAL
Preparation for removal Hold the machine by placing the
suitable stand under the engine.
Front fork Refer to “FRONT FORK” section.
1 Steering stem bolt 1
2 Handle crown 1
3 Ring nut 1 Use special tool.
Refer to “STEERING HEAD INSPEC-
TION AND ADJUSTMENT” section in
the CHAPTER 3.
4 Ball race cover 1
5 Under bracket 1
6 Bearing inner race 2
7 Upper bearing ball 19
8 Lower bearing ball 16
9 Dust seal 1
10 Bearing outer race 2
WARNING
Support the machine securely so there is nodanger of it falling over.
2
1