YBR125 motorcycle cylinder head assembly, cylinder head, side cover, seals and other accessories are fully matched with the engine, one-stop replacement without additional purchase of accessories; Cylinder head and side cover are made of high strength aluminum alloy casting, excellent heat dissipation performance, stable structure, suitable for engine working characteristics; Including sealing ring, cylinder head plug and other accessories, installation without additional sealing parts, save worry and high efficiency; Reserved valve, camshaft and other parts of the installation position, can directly reuse the original vehicle air distribution components, strong adaptability; The surface is equipped with heat dissipation fin and anti-rust coating, which not only ensures heat dissipation efficiency, but also avoids corrosion and carbon deposition, and prolongs service life.