Yamaha YZ450FN 2022, Owner'S Service Manual, Page: 120 / 366

FRONT WHEEL
4-6
EAM30017
REMOVING THE FRONT WHEEL
1. Use a maintenance stand to raise the front
wheel off the ground.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Remove:
•
Front wheel
EAM30019
DISASSEMBLING THE FRONT WHEEL
1. Remove:
•
Oil seal
• Bearing
a. Clean the outside of the front wheel hub.
b. Remove the oil seals “1” with a flat-head
screwdriver.
TIP
To prevent damaging the wheel, place a rag “2”
between the screwdriver and the wheel surface.
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
3-32 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:
• Bearing (left side) “1”
•
Spacer “2”
• Bearing (right side) “3”
•
Oil seal “4”
TIP
• Apply the lithium-soap-based grease to the
bearing and the oil seal lip when installing.
1
2
Spoke
2.5 N·m (0.25 kgf·m, 1.8 lb·ft)
Radial wheel runout limit
2.0 mm (0.08 in)
Lateral wheel runout limit
2.0 mm (0.08 in)
T
R
.
.
a
b
Ne w
Ne w
Ne w