What Causes the Squeaking Sound at Low Speeds in a Scooter?

[CatherineFitz]

Motorcycle low-speed abnormal noise reasons are as follows: Deteriorated Engine Oil: Insufficient or deteriorated engine oil inside the engine. Aging Parts: Normal wear and tear aging of components inside the engine. Engine Damage: Frequent improper operation or high-speed riding causing engine damage. Additional Information: Classification of Motorcycle Abnormal Noises: Knocking Sound Caused by Detonation: When the engine suddenly accelerates or the motorcycle is climbing a slope, a continuous sharp "tapping" sound from inside the cylinder indicates knocking caused by detonation. Air Leakage Sound: If the fastening bolts are loose or the gasket is damaged between the cylinder and cylinder head, cylinder and crankcase, or left and right crankcases, a "squeaking" air leakage sound will occur. Valve Knocking Sound: If the valve clearance increases due to improper adjustment or part wear, the valve mechanism will produce a short and sharp knocking sound.