What Causes Motorcycle Abnormal Noises?
3 Answers
Here are the specific reasons for motorcycle abnormal noises: Bearing Issues: If there are abnormal noises, it may be due to bearing problems. You need to contact the dealer to replace the vehicle or bearings. Another possibility is rusted bearings, which can be lubricated with oil. Any oil will work, but sewing machine oil is the best option. Slight Rear Brake Locking: Sometimes, dealers adjust the tension nut to achieve better braking performance. Occasionally, they may adjust it too tightly, causing slight locking of the brake drum and producing a squeaking sound. The inspection method is to loosen the rear brake tension nut slightly. If the squeaking persists, the issue lies elsewhere. Rear Shock Absorber Issues: New shock absorbers may produce squeaking sounds when initially bearing weight. The noise usually disappears after a few days of riding. The inspection method is to lift the bike (using the kickstand), turn the throttle, and let the wheel spin freely. If there is no noise during free spin but it occurs during actual riding, the noise is likely from the shock absorber.
I've been riding motorcycles for about thirty years, and most of the unusual noises I encounter are due to chain issues, such as looseness or rust and lack of lubrication, which cause a creaking sound when riding. Next, excessively worn brake pads produce a sharp screeching noise that clearly indicates they need replacement. If the valves in the engine are loose or the piston rings are worn, there will be a rhythmic knocking sound, and the louder it gets, the more dangerous it becomes. Additionally, damaged wheel bearings can produce a rumbling noise. Last time, my friend's motorcycle had a bearing issue, and failing to repair it promptly nearly caused an accident. I recommend checking the chain tension and cleaning and lubricating it after each ride. Applying anti-rust oil weekly can significantly reduce the occurrence of unusual noises. If you hear any strange sounds, stop and inspect the bike yourself first. For complex issues, seek professional help from a repair shop—don't push through to avoid damaging the bike or risking injury.
Last year, I got a new motorcycle. The first time I heard a squeaking sound, I was really nervous, thinking the engine was broken. Later, after checking, I found out it was just the rear brake pads being too thin—replacing them easily fixed the noise. Another time, during a long ride, the chain was loose and made a rubbing sound; a roadside worker just sprayed some oil on it, and it was fine. Now I’ve learned my lesson: I regularly check the brake pad thickness and chain condition, usually trying to clean them myself. If the sound is unfamiliar, like knocking, it might be an internal part issue, such as valve or shaft wear, and I’ll need a mechanic to inspect it with tools. Addressing problems early is always better than ignoring them—don’t let small issues turn into big ones.
