Removing The Rear Wheel; Disassembling The Rear Wheel; Checking The Rear Wheel; Checking And Replacing The Rear Wheel Sprocket - Yamaha WR450F 2021 Owner's Service Manual

EAM30022

REMOVING THE REAR WHEEL

1. Use a maintenance stand to raise the rear
wheel off the ground.
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
2. Remove:
• Rear wheel axle nut "1"
3. Loosen:
• Locknut "2"
4. Tighten:
• Adjusting bolt "3"
5. Remove:
• Rear wheel axle
• Rear wheel
TIP
• Push the rear wheel forward and remove the
drive chain from the rear wheel sprocket.
• Do not depress the brake pedal with the rear
wheel removed.
EAM30024

DISASSEMBLING THE REAR WHEEL

1. Remove:
• Oil seal
• Bearing
Refer to "DISASSEMBLING THE FRONT
WHEEL" on page 4-7.
EAM30023

CHECKING THE REAR WHEEL

1. Check:
• Rear wheel axle
• Rear wheel
• Bearing
• Oil seal
Refer to "CHECKING THE FRONT WHEEL"
on page 4-8.
2. Check:
• Tire
• Rear 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. Measure:
• Radial wheel runout
• Lateral wheel runout
Refer to "CHECKING THE FRONT WHEEL"
on page 4-8.
EAM30025
2
CHECKING AND REPLACING THE REAR
WHEEL SPROCKET
1. Check:
• Rear wheel sprocket
3
More than 1/4 tooth wear "a"  Replace the
1
rear wheel sprocket and the drive sprocket as
a set.
Bent tooth  Replace the rear wheel sprock-
et and the drive sprocket as a set.
b. Correct
1. Drive chain roller
2. Rear wheel sprocket
2. Replace:
• Rear wheel sprocket
a. Remove the self-locking nuts and the rear
wheel sprocket.
b. Clean the rear wheel drive hub with a
clean cloth, especially the surfaces that
contact the sprocket.
c. Install the new rear wheel sprocket.
4-13
REAR WHEEL
Radial wheel runout limit
2.0 mm (0.08 in)
Lateral wheel runout limit
2.0 mm (0.08 in)