RK is the leading manufacturer of motorcycle drive chains in Japan. For over 40 years, RK has supplied as original equipment to all renowned Japanese motorcycle manufacturers. Also in competition, RK is the first choice of many teams in MotoGP, motocross or even the Paris-Dakar Rally.
RK MXU:
A special shape of O-ring for MX racing. Thanks to the flat shape of the ring and its small dimensions, the chain remains very thin and light, but lubricant leakage is prevented throughout the stroke.