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FINAL DRIVE 11-13
Sprocket, Coupling
Sprocket Wear Inspection
•
Visually inspect the engine and rear sprocket teeth for
wear and dam age.
If the teeth are w orn as illustrated, replace the sprocket,
and inspect the drive chain wear (see Drive Chain Wear
Inspection).
[A] Worn Tooth (Engine Sprocket)
[B] Worn Tooth (Rear Sprocket)
[C] Direction of Rotation
NOTE
○
If a sprocket requires replacement, the chain is probably
worn also.
When r
eplacing a sprocket, inspect the chain.
Rear Sprocket Warp Inspection
•
Raise the rear wheel off the ground (see Wheels/Tires
chapter) so that it will turn freely.
•
Set a dial gauge [A] against the rear sprocket [B] near the
teeth as shown, and rotate [C] the rear wheel to measure
the sprocket runout (warp). The difference between the
highest and lowest dial gauge readings is the amount of
runout (warp).
If the runout exceeds the service limit, replace the rear
sprocket.
Rear Sprocket Warp
Standard: 0.4 mm (0.016 i n.) or less
Service Limit: 0.5 mm (0.020 in.)