All of the motorcycle chains are made from high-quality alloy steel, Through our special process can reduce the hardness difference on plates and roller after heat treatment, so than improvetoughness,tensile strength and impact resistance for the components. The carbonitriding process for the Pin and Bush, increasing the surface-hardness for the components up to â?¥HV0.2 780. Shot blasting process for the plates, bush, roller, greatly improved the fatigue resistance to assure the stable of the chain duing running.