Not recommended for street use.
420MXZ4 MINI WORKS CHAIN
428MXZ4 MINI WORKS CHAIN
520MXZ4 WORKS CHAIN
RK MXZ4 WORKS RACE CHAINS
Heavy duty chains made for the serious Motocross racer, MXZ4 chains feature Chromoly steel construction with seamless rollers and bushings, and oversized special alloy pins for added strength. All components are heat-treated using RK's exclusive HIT (Heat Induction Transfer) process.
The newly released 420 and 428MXZ4 lightweight mini-works racing chains were developed from the same advanced alloy material and manufacturing technology as 520MXZ4. The 420 and 428MXZ4 Racing Chains are the strongest in their class giving you the best Value-Performance rating of any MX Racing Chain in the world today!
The 520MXZ4 has a maximum tensile strength rated at 8,000 foot pounds and weighing in at only 3.02 lbs., 520MXZ4 is the lightest and strongest Motocross chain available today! Ideal for professional level 125cc to 500cc Open Class racing.