RK GB420MXZ4-120 Gold Pro MX Chain Rider Body Protection RD 250 E/F (1978-1979)

RD 250 E/F (1978-1979)

abrasion-resistant materials

5mg (15% RI)

YFM 350 Grizzly Auto 4x4 (2006-2013)

Premium three-layer face foam provides excellent moisture management and a tight seal

RK GB420MXZ4-120 Gold Pro MX Chain Rider Body Protection RD 250 E/F (1978-1979)Gold 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