The RK 420 MXZ4 is a lightweight, high-strength drive chain built for motocross and supercross riding. Chromoly steel construction with seamless rollers/bushings and oversized alloy pins delivers durability under hard acceleration.
The RK 420 MXZ4 Drive Chain is designed for riders who demand fast response and dependable strength in motocross and supercross conditions. Built with chromoly steel and reinforced with oversized special alloy pins, it helps handle repeated hard launches, landings, and roost-filled race days while keeping weight low for quick power transfer.
If your current chain stretches quickly or feels inconsistent under load, the MXZ4 series construction with seamless rollers and bushings is made to improve durability and smooth operation. With a convenient clip-style master link, installation and trackside servicing are straightforward—ideal for frequent maintenance schedules typical of non-sealed MX chains.
