What Causes Motorcycle Handlebar Wobble?

[VanNoah]

When a motorcycle is moving at low speeds, the main causes of handlebar wobble are as follows: Excessive clearance in the steering stem bearings: With prolonged use of the motorcycle, the bearing nuts on the handlebar may loosen, and the upper and lower bearing races and ball bearings can become severely worn. If the clearance is not adjusted in time, this will inevitably cause the handlebar to wobble back and forth during riding. Maintenance tips: Adjust the steering stem bearing nuts on the motorcycle handlebar to eliminate the clearance. If the bearing nuts are already tightened to the maximum but the clearance persists, disassemble and inspect the ball bearings and upper/lower bearing races for damage. If they are damaged, replace them with new ball bearings or upper/lower bearing races.