Yamaha YZ125X 2021, Owner'S Service Manual

Page: 82 / 268

CHASSIS
3-18
b. After loosening the ring nut “2” with a
steering nut wrench “3”, tighten it to the
specified torque.
TIP
• 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
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.
Refer to “STEERING HEAD” on page
4-50.
d. Loosen the ring nut fully turn and then
tighten it to specification with a steering
nut wrench.
WARNING
EWA21110
Do not overtighten the steering ring nut.
e. Check the steering head for looseness or
binding by turning the front fork all the way
in both directions. If any binding is felt, re-
move the lower bracket and check the up-
per and lower bearings.
Refer to “STEERING HEAD” on page
4-50.
f. Install the washer “1”.
5. Install:
• Upper bracket
Refer to “STEERING HEAD” on page 4-50.
• Handlebar
Refer to “HANDLEBAR” on page 4-32.
EAM30502
LUBRICATING THE STEERING HEAD
1. Lubricate:
• Upper bearing
•
Lower bearing
• Bearing race
EAM30338
CHECKING THE FRONT FORK LEGS
1. Stand the vehicle upright on a level surface.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Check:
•
Inner tube
Damage/scratches

Replace.
•
Front fork leg
Oil leaks between inner tube and outer tube

Replace the oil seal.
3. Hold the vehicle upright and apply the front
brake.
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)
1
3
2
T
R
.
.
Steering ring nut (final tightening
torque)
7 N·m (0.7 kgf·m, 5.2 lb·ft)
Recommended lubricant
Lithium-soap-based grease
T
R
.
.
1