What Causes the Constant Brushing Sound from a Motorcycle Chain?
2 Answers
Motorcycle chains constantly making a "brushing" sound may be due to poor alignment between the chain and the sprocket or insufficient lubrication of the motorcycle chain. Below are detailed explanations of the causes: Chain and Sprocket Insufficient Lubrication Causing Noise: If the chain and sprocket are not properly aligned, friction occurs between them during riding, leading to unusual noises from the chain. Solution: This issue cannot be adjusted by oneself. The process of replacing the entire chain and sprocket set requires professional handling, as forcing an adjustment may cause more significant malfunctions. Motorcycle Chain Insufficient Lubrication Causing Noise: Insufficient lubrication of the chain can cause friction or even jamming, inevitably resulting in noise during riding. It is essential for the owner to promptly inspect and clean the chain to avoid chain drop incidents while riding. Solution: If inspection reveals insufficient lubrication, adding lubricating oil can resolve the issue, and this can be done by the owner.
The chain keeps making a brushing noise. As an experienced rider with over ten years of motorcycle experience, the most common reasons are that the chain is too loose, causing it to sway and produce that friction sound while riding, or the chain is dry and lacks lubrication, leading to increased noise from direct metal friction. The chain tension should be appropriate—too tight will accelerate wear, and too loose can cause jumping and noise. Misalignment of the rear wheel can also cause uneven chain wear and abnormal sounds. I recommend a quick check of the chain tension before each ride by pressing down on the middle section of the chain; generally, 2-3 cm of slack is ideal. Regularly spray chain lubricant, especially after riding in the rain or long-distance trips, to prevent dirt buildup and increased noise. Neglecting these small details over time can worsen the chain's condition, even leading to breakage and dangerous accidents, so I make it a habit to thoroughly clean and maintain the chain system every 500 kilometers.
