O-Ring X-Ring Motorcycle Chain Our motorcycle chain meet or exceed DIN, ANSI,ISO,BS,JS standard, and stand up to the toughest w Our motorcycle chain meet or exceed DIN, ANSI,ISO,BS,JS standard, and our chains stand up to the toughest working environments with years of trouble-free performance. With over 20 years of experience, Huayu can design and manufacture almost any solution for power ...