Why does a scooter make a squeaking noise at low speeds?

[DelRyan]

The reasons for a scooter making a squeaking noise at low speeds are as follows: 1. Piston issue in the lower pump: If the piston is stuck, it may prevent the brake shoes from fully separating from the disc, leading to a squeaking noise. The piston can be disassembled and cleaned. 2. Wear of disc brake shoes: If the brake shoes are worn (including uneven wear), and the friction surface of the shoes has exposed metal edges, it will cause a squeaking noise when rubbing against the disc. 3. Uneven disc surface: If the disc has obvious concentric groove marks and is no longer a smooth friction surface, it indicates uneven wear of the brake shoes. Below are the maintenance methods for scooters: 1. Air filter: Clean every 2000 km, as the air filter in scooters is positioned lower than in standard motorcycles and the intake direction is usually horizontal, making it dirtier during operation. 2. Engine oil: Replace every 800 to 1500 km, and use a unified engine cleaner during the change.