Many motorcycle owners will encounter the problem of abnormal noise when the new motorcycle brake pads are replaced. This noise not only affects the driving experience, but also may make people worry about the safety of the brake system. To solve this problem, it is necessary to start from the source of the abnormal noise, gradually check the possible factors and take targeted measures. First of all, you should check whether the motorcycle brake pads are installed in place. In many cases, the abnormal noise is caused by the omission of details during the installation process. For example, whether the motorcycle brake pads are fully embedded in the caliper slot, whether the fixing screws are tightened, and whether there is misalignment between the fitting surface of the motorcycle brake pads and the brake disc. If the screw force is uneven during installation, or the guide pins on the caliper bracket are not properly lubricated, the motorcycle brake pads may be displaced or vibrated during braking, resulting in a sharp friction sound.
Secondly, it is crucial to run in the new motorcycle brake pads correctly. The newly replaced motorcycle brake pads have not yet formed a good fitting surface with the brake disc surface. If frequent emergency braking or high-speed braking is used at this time, it is easy to cause abnormal wear on the surfaces of both due to excessive local pressure, which in turn causes abnormal noise. Correct running-in requires that during the driving process of the vehicle, the motorcycle brake pads and the brake disc are gradually rubbed and matched through gentle and even braking operations. For example, on a road section with good road conditions, lightly step on the brakes while driving at a medium speed to slow down the vehicle slowly. After repeated many times, the contact surface of the two will gradually become flat and fit, and the abnormal noise will also be reduced.
The cleanliness of the brake system components may also affect the generation of abnormal noise. If dust, metal debris or oil stains adhere to the surface of the motorcycle brake pads or brake disc during installation, the normal friction state of the two will be destroyed. In particular, oil stains, once contaminated on the motorcycle brake pads, will greatly reduce the friction coefficient, resulting in slipping and abnormal noise during braking. At this time, a special brake system cleaner is required to carefully wipe the friction surface of the motorcycle brake pads and the surface of the brake disc to remove impurities and oil stains. When cleaning, be careful to avoid touching the surface of the motorcycle brake pads directly with your hands to prevent grease residue on your hands. At the same time, check whether there is oil seepage around the caliper piston. If there is, it is necessary to further check whether the brake oil pipe is leaking.
The material matching problem of motorcycle brake pads and brake discs should not be ignored. The brake system design of different models has specific requirements for the material of motorcycle brake pads. If the motorcycle brake pads that do not meet the specifications of the original vehicle are replaced, abnormal noise may be generated due to the mismatch of material hardness and friction coefficient. For example, when the semi-metallic motorcycle brake pads are matched with cast iron brake discs, if the metal particles in the motorcycle brake pads are unevenly distributed, high-frequency vibration noise may be generated during friction. In this case, you can try to replace the motorcycle brake pads with the same brand and model as the original vehicle, or choose high-performance motorcycle brake pads that have been adapted and tested to reduce the abnormal noise caused by material incompatibility.
The working condition of the brake caliper also needs to be carefully checked. If the guide pin of the caliper lacks lubrication or is rusted, the motorcycle brake pads will not be able to return to their original position in time after braking, and will continue to rub slightly with the brake disc, resulting in a "sizzling" abnormal sound. At this time, the caliper needs to be removed, the guide pins need to be cleaned, and a special high-temperature resistant grease needs to be applied to ensure that the guide pins can move flexibly. In addition, if the caliper piston is stuck, the pressure on one side of the motorcycle brake pads will be too high, causing eccentric wear and accompanied by abnormal noise. In this case, the piston needs to be cleaned and reset, and the caliper seal needs to be replaced if necessary.
The surface flatness of the brake disc will also affect the generation of abnormal noise. If the brake disc is slightly deformed due to high temperature or impact, or deep grooves are formed on the surface, it will cause uneven contact between the motorcycle brake pads and the brake disc, and vibration noise will be generated during braking. During inspection, you can visually observe whether there are obvious scratches or grooves on the surface of the brake disc, or you can touch the surface with your hands to feel the flatness. If the deformation or wear is not serious, the brake disc surface can be polished and repaired by professional disc equipment; if the wear exceeds the use limit, a new brake disc needs to be replaced to ensure good cooperation with the new motorcycle brake pads.
In addition, driving habits also have a certain impact on the abnormal noise of new motorcycle brake pads. Frequent emergency braking or long-term continuous braking will cause the temperature of the motorcycle brake pads to rise sharply, resulting in thermal decay of the friction material, which in turn causes abnormal noise. In daily driving, sudden and heavy braking should be avoided as much as possible. You can predict the road conditions in advance and use the engine brake to assist deceleration to reduce the load on the motorcycle brake pads. If you find abnormal noise and still cannot solve it after handling it yourself, you should go to a professional maintenance outlet in time and let the technicians use professional tools to conduct a comprehensive inspection to avoid affecting the overall performance of the brake system due to ignoring the problem and ensure driving safety.
