Checking And Replacing The Sprocket; Checking The Rear Wheel Drive Hub - Yamaha YBR250 2007 Service Manual

REAR WHEEL, BRAKE DISC
AND REAR WHEEL SPROCKET
1
2
CHECKING AND REPLACING THE
SPROCKET
1. Check:
• sprocket
More than 1/4 tooth a wear --> Replace
the rear wheel spur gear.
Bent teeth => Replace.
b correct
1 drive chain roller
2 sprocket
2. Replace:
• sprocket
a. Remove the self-locking nuts and the
sprocket.
b. Clean the rear wheel drive hub with a clean
cloth, especially the surfaces that contact the
sprocket.
c. Install the new sprocket.
Rear wheel sprocket self-locking nut
43 N.m (4,3 kgf.m, 31.7 ft.lb)
NOTE:
Tighten the self-locking nuts in stages and in a
crisscross pattern.

CHECKING THE REAR WHEEL DRIVE HUB

1. Check:
• rear wheel drive hub 1
Cracks/damage --> Replace.
• rear wheel drive hub damper 2
Damage/wear --> Replace.
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CHAS