Why should the front brake of a motorcycle, especially a women's motorcycle, be used with caution? This is mainly because the center of gravity of the women's motorcycle is in the back, and the front is locked forcibly. The huge inertia of the back cannot be held, and problems occur every minute. The engine and battery of the men's motorcycle are in the middle, so the center of gravity deviation is not so serious. However, the center of gravity is relatively high, and the possibility of falling is also high. Driving a motorcycle successfully is far more complicated than driving a car. A motorcycle needs an excellent sense of balance and a high sense of space and awareness of other road users. How to refit motorcycle brake accessories to make it safer to use can be considered from two aspects: motorcycle brake valve and motorcycle brake disc.