What Causes the Abnormal Noise in Motorcycle Disc Brakes?
2 Answers
Abnormal noise in the front disc brake of a motorcycle is a common braking issue, which can be attributed to the following reasons: 1. Rusty Brake Pads: If the motorcycle has not been used for a long time or the brake pads get wet and rust during riding, a sharp abnormal noise may occur. In this case, it can usually be ignored, as the noise will disappear on its own after several uses. 2. Worn Brake Pads: Disc brake pads are prone to wear. When the brake pads are excessively worn, this phenomenon will appear. At this point, new brake pads must be replaced; otherwise, the brake disc can easily be damaged. 3. Abnormal Noise After Replacing Brake Pads: Abnormal noise may occur after replacing the brake pads. If the brake pads were just replaced, this is normal. However, if the noise persists after some use, it is abnormal, and the brake pads should be replaced again. The previously replaced brake pads may have quality defects, so new ones must be installed.
As a long-time motorcycle rider, I've encountered disc brake noise several times while riding. The most common cause is brake pads worn to their limit, which produce a sharp squealing sound during friction, especially after riding in the rain when moisture residue is more likely to cause it. If the disc surface has scratches or is uneven, it can create metallic grinding noises when braking, or disc warping may cause body vibration during braking. Foreign objects like small stones or dust entering the brake system can also cause strange noises, so extra caution is needed when riding on gravel roads. If left unaddressed, braking performance deteriorates, compromising safety. I recommend regularly checking brake pad thickness and replacing them when they feel thin, while keeping the discs clean. For severe noise issues, it's best to have a professional shop inspect the hydraulic system. Avoiding sudden braking can extend component lifespan.
