How to Solve the Problem of Harsh Noise from Motorcycle Rear Brake?
2 Answers
There is oil contamination between the brake shoes and the brake drum of the drum brake. Clean the brake drum and brake shoes with alcohol to remove the oil contamination. Use 800# sandpaper to polish the surface of the brake shoes to increase the friction of the brake shoes.
I've been riding motorcycles for over a decade, and screeching rear brakes are all too common. Last time my little scooter sounded like nails on a chalkboard—it was downright annoying. When I took it apart, the brake pads were worn down to a thin sliver, with the metal backing plate scraping directly against the rotor. No wonder it screamed! I promptly spent about a hundred bucks on new brake pads and took the time to scrub off any sand or metal debris from the brake disc. The noise vanished immediately after the replacement. A word of advice: don't ignore unusual brake noises—it could mean your pads are already at the safety limit. Delaying further risks lock-ups during emergency stops. Pay extra attention after the rainy season, as moisture can harden the brake pad surface and cause squealing.