Sprocket, Coupling. Rear Sprocket Removal

Rear Sprocket Removal

• Remove the rear wheel (see Rear Wheel Removal in the Wheels/Tires chapter).

• Remove the rear sprocket nuts [A]. Remove the rear sprocket [B].

Rear Sprocket Installation

• Install the sprocket facing the tooth number marking [A] outward.

• Tighten the rear sprocket nuts.

Torque - Rear Sprocket Nuts: 33 N-m (3.4 kgf-m, 24 ft-lb)

• Install the rear wheel (see Rear Wheel Installation in the Wheels/Tires chapter).

• Adjust the drive chain slack after installing the sprocket (see Drive Chain Slack Inspection in the Periodic Mainte­nance chapter).

Sprocket Wear Inspection

• Visually inspect the engine and rear sprocket teeth for wear and damage.

• If the teeth are worn as illustrated, replace the sprocket with a new one, and inspect the drive chain wear (see Drive Chain Wear Inspection in the Periodic Maintenance chapter).

Worn Tooth (Engine Sprocket)

Worn Tooth (Rear Sprocket)

Direction of Rotation

NOTE

О If a sprocket requires replacement, the chain is proba­bly worn also. When replacing a sprocket, inspect the chain.

Rear Sprocket Warp Inspection

• Raise the rear wheel off the ground 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: less than 0.4 mm (0.016 in.)

Service Limit: 0.5 mm (0.020 in.)