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4.2 Fault Diagnosis
4.2.1 Shimmy Rear Wheel
z Distorted wheel rim
z Worn rear bearing
z Troubled tyre
z Worn or injured swing arm pivot bush
z Improper adjustment of drive chain adjuster
z Unbalance of tyre and wheel
z Tyre pressure is too low
z Bent frame or swing arm
4.2.2 Inflexible Wheel Rotation
z Flexible rear liquid brake plate
z Worn rear bearing
z Too tight drive chain
4.2.3 Soft suspension
z Insecure damping spring with shock
z Incorrect front suspending regulator
z Oil leakage of shock absorber
z Tyre pressure is too low
4.2.4 Hard suspension
z Damage of assembly axle on shock absorber
z Bending shock absorber pipe
z Damage of rear rocking arm pivot bearing
z Bending rear rocking arm pivot bearing
z Incorrect suspending regulator
z Tyre pressure is too high
4.2.5 Operation with one side only or not taking straight line
z Bending rear axle
z Arrangement of axle of both sides/incompetent chain regulator