RK is the leading manufacturer of motorcycle drive chains in Japan. For over 40 years, RK has supplied all known Japanese motorcycle manufacturers as original equipment. Also in racing, RK is the first choice of many teams in MotoGP, in motocross or even in the Paris-Dakar Rally.
RK MXU:
A special form of o-ring for MX racing. Due to the flat shape of the ring and the small dimensions, the chain remains very thin and light, although the leakage of lubricant in the distance of the race is avoided.