RK 420 Standard Series drive chain for small-displacement motorcycles, built from heat-treated and shot-peened carbon alloy steel for reliable strength and long service life. Pre-stressed and pre-stretched construction helps deliver smooth power transfer with reduced maintenance.
Upgrade or replace your final drive with the RK 420 Standard Drive Chain, designed for motorcycles that originally came equipped with a standard (non O-ring) chain. Built to deliver dependable power transfer and consistent performance, this chain uses high-quality materials and manufacturing processes to help you ride with confidence and spend less time on adjustments.
RK chains are pre-stressed and pre-stretched to support even load distribution, helping to reduce initial stretch and keep drivetrain feel more consistent over time. The heat-treated, shot-peened components and solid rollers are engineered for strength and durability—ideal for everyday riding, pit bikes, and small-displacement off-road or street machines.
