What Causes the Rear Brake of a Motorcycle Not to Retract?

1 Answers
CoraMarie
07/30/25 10:07am
The main reasons why the rear brake of a motorcycle does not retract are: 1. The brake is corroded and cannot return smoothly, and the spring's elastic force cannot overcome the resistance caused by corrosion. Using a cleaning agent to clean it can restore functionality. 2. Water entering the brake fluid causes the piston in the wheel cylinder to rust. Here is some additional information: 1. The principle of disc brakes: Disc brakes use stationary brake calipers to clamp the rotating brake disc attached to the wheel, creating friction to reduce the wheel's rotation speed. When the brake pedal is pressed, the piston in the master cylinder is pushed, creating pressure in the brake fluid circuit. 2. Advantages of disc brakes: (1) Disc brakes dissipate heat better than drum brakes, making them less prone to brake fade and failure during continuous braking. (2) The thermal expansion of the brake disc in the thickness direction is minimal, so heat-induced size changes do not increase the brake pedal travel. (3) Disc brake systems respond quickly and can perform high-frequency braking actions, making them more suitable for ABS system requirements.
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