What Causes the Abnormal Noise in Motorcycle Disc Brakes?

2 Answers
DiNaomi
09/04/25 6:04am
Abnormal noise in the front disc brake of a motorcycle is a very common brake failure, and there are two main reasons for this: Brake pad rust: If the motorcycle has not been ridden for a long time or the brake pads get wet and rust during riding, a relatively harsh abnormal noise will occur. In this case, you can actually ignore it, as the noise will automatically disappear after continuous use several times. Brake pad wear: The brake pads of disc brakes are prone to wear. When the brake pads are excessively worn, this phenomenon will occur. At this time, new brake pads must be replaced, otherwise the brake disc can be easily damaged. Abnormal noise after replacing brake pads: Abnormal noise may occur after replacing the brake pads. If the brake pads have just been replaced, this is normal. However, if the abnormal noise persists after some use, it is not normal, and the brake pads should be replaced again. This is because the previously replaced brake pads may have quality defects, so new brake pads must be installed.
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AdrianaLee
09/16/25 7:00am
As an experienced motorcycle rider, I've found that disc brake noise can be caused by several common issues. Worn-out or dirty brake pads with uneven friction surfaces often produce rattling sounds, especially on rainy or dusty roads. Scratched or corroded brake discs can also cause noise, particularly during repeated braking. Improper installation is another factor, such as misaligned calipers or loose screws causing component vibration. Safety is crucial – brake noise isn't just annoying but indicates reduced braking efficiency, requiring prompt inspection and replacement. After rainy seasons, moisture entering the brake system may oxidize metal parts, becoming more noticeable after washing. Before each ride, I quickly check if the brake pads meet thickness requirements and clean dust with a soft brush. If the noise persists, I immediately visit a professional shop for repairs – never let minor issues become major problems.
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