The Standard Series Rad Valve is “Performance Optimized” - tailor-made to give the Beta 250cc/300cc engines strong midrange power for all terrain. The RC2 Series Rad Valve multi-stage reed petal system has also been painstakingly developed and tested to increase throttle response and acceleration, while also broadening peak RPM horsepower output.
The Rad Valve’s seamless, one-piece, precision casting and continuous aero-form surfacing provide maximum flow velocities and instant, explosive movement of air particles the moment you turn the throttle. Standard equipment on each Rad Valve are Boyesen’s dual-stage model-tensioned carbon reed petals. The race-proven reed petals are integral to the Rad Valve’s ability to maintain timing with the power pulses of the Beta engine platform. Your machine will gain maximum flow velocity across the entire RPM range, and at all throttle settings. Smooth. Sharp. Smart.
Fits all years oil injected 300RR/RX, 250RR, and XTrainer.
"There are a slew of available mods for the Beta 300/250, this should be at the top of the list."
Dirt Bike May 2023
Boyesen Beta 300|250 RAD Valve - Standard Oil Injected
Produced by Boyesen of USA
