The RK 520 MXU is an ultra-light sealed-ring racing drive chain built for consistent power delivery and extended chain life. Designed for off-road race bikes from 125–500cc and supplied with a clip connecting link.
RK 520 MXU Chain is built for riders who want maximum performance without unnecessary weight. As one of the lightest sealed-ring racing chains available, it helps your bike deliver power smoothly while maintaining durability for demanding motocross and enduro conditions. The sealed UW-Ring design keeps lubrication where it belongs, supporting longer chain life and more consistent performance across motos and training days.
If you’re tired of frequent chain stretch, inconsistent feel under load, or replacing drivetrain components too often, the 520 MXU is designed to reduce wear while staying race-ready. It’s ideal for off-road race applications in the 125–500cc range and comes ready to install with a clip connecting link.
