Checking And Adjusting The Steering Head - Yamaha YZ125 Owner's Manual

Drive chain slack (Maintenance
stand)
48.0–58.0 mm (1.89–2.28 in)
Adjusting the drive chain slack
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
1. Adjust:
• Drive chain slack
a. Loosen the wheel axle nut "1".
b. Loosen both locknuts "2".
c. Turn the adjusting bolt "3" until the speci-
fied drive chain slack is obtained.
1
TIP
• To maintain the proper wheel alignment, adjust
both sides evenly.
• Push the rear wheel forward to make sure that
there is no clearance between the swingarm
end plates and the ends of the swingarm.
d. Tighten the wheel axle nut.
Rear wheel axle nut
125 N·m (12.5 kgf·m, 92 lb·ft)
e. Tighten the drive chain puller locknut.
Drive chain puller locknut
19 N·m (1.9 kgf·m, 14 lb·ft)
EAM30247
CHECKING AND ADJUSTING THE
STEERING HEAD
1. Use a maintenance stand to raise the front
wheel off the ground.
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
2. Check:
• Steering head
Grasp the bottom of the front fork legs and
gently rock the front fork.
Blinding/looseness  Adjust the steering
head.
3. Remove:
• Handlebar
• Upper bracket
4. Adjust:
• Steering head
a. Remove the washer "1".
2
b. After loosening the ring nut "2" with a
TIP
3
• Set the torque wrench at a right angle to the
steering nut wrench.
• Move the steering to the left and right a couple
of times to check that it moves smoothly.
c. Turn the front fork to the right and left a few
3-17
1
steering nut wrench "3", tighten it to the
specified torque.
3
2
Steering nut wrench
90890-01403
Exhaust flange nut wrench
YU-A9472
Steering ring nut (initial tighten-
ing torque)
38 N·m (3.8 kgf·m, 28 lb·ft)
times, and make sure that the steering ro-
tates smoothly. If it does not turn smooth-
ly, remove the lower bracket and check
the upper and lower bearings.
CHASSIS