Yamaha WR450F 2021, Owner'S Service Manual

Page: 136 / 402

FRONT WHEEL
4-8
c. Remove the bearings with a bearing pull-
er.
EAM30018
CHECKING THE FRONT WHEEL
1. Check:
•
Front wheel axle
Roll the front wheel axle on a flat surface.
Bends

Replace.
WARNING
EWA13460
Do not attempt to straighten a bent wheel ax-
le.
2. Check:
• Tire
•
Front wheel
Damage/wear

Replace.
Refer to “CHECKING THE TIRES” on page
3-33 and “CHECKING THE WHEELS” on
page 3-33.
3. Check:
•
Spoke
Refer to “CHECKING AND TIGHTENING
THE SPOKES” on page 3-33.
4. Tighten:
•
Spoke
Refer to “CHECKING AND TIGHTENING
THE SPOKES” on page 3-33.
TIP
After tightening the spokes, measure the wheel
runout.
5. Measure:
•
Radial wheel runout “a”
• Lateral wheel runout “b”
Out of specification

Repair/replace.
6. Check:
•
Collar
Damage/wear

Replace.
7. Check:
• Bearing
Front wheel turns roughly or is loose

Re-
place the wheel bearings.
•
Oil seal
Damage/wear

Replace.
EAM30020
ASSEMBLING THE FRONT WHEEL
1. Install:
• Damper
TIP
Install the dampers with their curves along the
ones of the speed sensor rotor.
2. Install:
• Speed sensor rotor
TIP
Snap the speed sensor rotor to the brake disc
with the gaps of the rotor “b” aligned with the por-
tion “a” of the brake disc.
Spoke
2.5 N·m (0.25 kgf·m, 1.8 lb·ft)
1
2
T
R
.
.
Radial wheel runout limit
2.0 mm (0.08 in)
Lateral wheel runout limit
2.0 mm (0.08 in)
a
b