Why is there a noise when rotating the rear wheel of a motorcycle?

[StKatherine]

The reasons for noise when rotating the rear wheel of a motorcycle: bearing damage, severe wear of components. Bearing damage: Lift the motorcycle stand, stand on the side with the chain and sprocket, hold the rear shock absorber with your left hand, grab the rear wheel with your right hand, and swing the rear wheel left and right (i.e., move it toward the left and right shock absorbers). If you feel a gap between the rear wheel and the rear axle (i.e., the rear wheel seems to wobble left and right), it indicates the bearing is faulty and needs replacement. Severe wear of components: The clutch is excessively worn and should be replaced promptly; the pulley is severely worn; gear wear (caused by insufficient oil in the gearbox or long-distance driving); wear of the rear drum brake.