Removing The Rear Wheel (Disc); Disassembling The Rear Wheel; Checking The Rear Wheel; Checking And Replacing The Rear Wheel Sprocket - Yamaha WR125R 2009 Service Manual

EAS22040

REMOVING THE REAR WHEEL (DISC)

1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
TIP
Place the vehicle on a suitable stand so that the
rear wheel is elevated.
2. Loosen:
• Drive chain adjusting locknut
• Drive chain adjusting nut
3. Remove:
• Rear wheel axle nut
• Rear wheel axle
• Drive chain alignment plate
• Rear wheel
TIP
Push the rear wheel forward and remove the
drive chain from the rear wheel sprocket.
4. Remove:
• Rear brake caliper
TIP
Do not depress the brake pedal when removing
the brake caliper.
EAS22080

DISASSEMBLING THE REAR WHEEL

1. Remove:
• Oil seals
• Wheel bearings
Refer to "DISASSEMBLING THE FRONT
WHEEL" on page 4-10.
EAS22100

CHECKING THE REAR WHEEL

1. Check:
• Rear wheel axle
• Rear wheel
• Wheel bearings
• Oil seals
Refer to "CHECKING THE FRONT WHEEL"
on page 4-10.
2. Check:
• Tire
• Rear wheel
Damage/wear → Replace.
Refer to "CHECKING THE TIRES" on page
3-23 and "CHECKING THE WHEELS" on
page 3-25.
3. Check:
• Spokes
Refer to "CHECKING THE FRONT WHEEL"
on page 4-10.
4. Measure:
• Radial wheel runout
• Lateral wheel runout
Refer to "CHECKING THE FRONT WHEEL"
on page 4-10.
Radial wheel runout limit
1.0 mm (0.04 in)
Lateral wheel runout limit
0.5 mm (0.02 in)
EAS22120
CHECKING AND REPLACING THE REAR
WHEEL SPROCKET
1. Check:
• Rear wheel sprocket
More than 1/4 tooth "a" wear → Replace the
rear wheel sprocket.
Bent teeth → Replace the rear wheel sprock-
et.
b. Correct
1. Drive chain roller
2. Rear wheel sprocket
2. Replace:
• Rear wheel sprocket
M MMM M MMM M M MMM
a. Remove the self-locking bolts, nuts, and the
rear wheel sprocket.
4-17
REAR WHEEL
M M MMM M M MMM M M MMM M MMM