RK GB420MXZ4-136 Gold Pro MX Chain Clutches with thick construction and arch

with thick construction and arch support to offer a more padded and snug fit inside your motocross boots

removable/washable air channeled comfort liner

430 RR 15-25

creating a striking visual contrast

YZ250 (2001-2015)

RK GB420MXZ4-136 Gold Pro MX Chain Clutches with thick construction and archGold premium MX non sealed 420MXZ4 drive chain. One of the lightest and strongest MX chains from RK. The lightest and strongest Motocross chain from RK. The MXZ4 is the next generation of motocross racing chains featuring Chromoly steel construction and seamless rollers and bushings. Made for the professional motocross racer. Features special alloy pins with RK special HCR Treatment (High Tech Chromium Carbide Layered Pins) which drastically improves