How to Solve Motorcycle Brake Lock-Up?
2 Answers
Motorcycle brake lock-up can be resolved by removing the lower pump, pressing or squeezing the brake 2-5 times to make the piston protrude 5-10mm, spraying rust remover on the rusty areas, and using fine sandpaper wrapped around the piston to rotate and clean it. After cleaning, press the piston back, reinstall the upper pump, and finally pump the brake repeatedly until you feel pressure and the brake rebounds. Brake lock-up without rebound is mostly caused by water entering the brake fluid, leading to rust on the piston of the slave cylinder, which hinders the rebound force. Additionally, if the piston is smooth and not rusty, it could also be due to aging, swelling, or deformation of the rectangular rubber seal ring. This issue can be resolved by replacing the rectangular rubber seal ring. A disc brake consists of a brake disc connected to the wheel and a brake caliper at the edge of the disc. When braking, high-pressure brake fluid pushes the brake pads to clamp the disc, creating the braking effect. Other causes and solutions for motorcycle brake lock-up: Water in the braking system: The master cylinder rubber cup expands due to water absorption, requiring immediate replacement of the braking system. Insufficient stiffness of the brake disc: Frequent braking can cause the brake disc to deform under high temperatures due to insufficient stiffness, leading to wheel lock-up during subsequent use. Incompatible brake pads: If the brake pads were originally semi-metallic, they may easily adhere to the brake drum due to oxidation and rust. This issue should be addressed during the design phase by appropriately determining the brake pad formulation.
I once encountered a motorcycle brake lock-up issue. It happened during a weekend ride when I suddenly felt the rear wheel lock up, nearly causing a crash, and my heart was racing. I immediately pushed the bike to the roadside and found the brake pads and disc covered in rust and stuck together, likely due to accumulated rainwater or dust and lack of maintenance. I tried gently tapping the brake pads loose with a small hammer and applied some grease to the axle neck, which barely fixed the issue. Later, I went to a repair shop for a thorough cleaning and replacement of new parts to avoid further danger. This experience taught me that when facing brake lock-up, the first step is to calmly stop the bike and avoid forcing the ride to prevent accidents. Regular cleaning of the brake system and applying anti-rust spray for protection is essential. Extra caution is needed when riding in wet weather—motorcycle safety is no trivial matter, as details determine safety and danger.
