The Boyesen Bolt-On Duo: RAD Valve & Waterpump Kit

Designed for riders who want real results without the hassle, the Boyesen RAD Valve & Waterpump Kit combo delivers crisp throttle response, improved torque, and cooler engine temps—no engine teardown required.

This bolt-on performance duo features Boyesen’s patented dual-stage RAD Valve for smoother airflow and snappier power delivery, paired with the high-flow Waterpump Cover & Impeller Kit to boost cooling efficiency and keep your bike running stronger, longer.

From gate drops to trail climbs, Boyesen is trusted by factory pros and weekend warriors alike. Whether you ride moto or off-road, this combo gives you the reliability and power you need to push harder every ride.

Built for 2-stroke perfection. Backed by race-proven engineering.

Less wrenching. More ripping.