BOYSEN The RAD or Radical Air Design Valve is a radical new concept in reed cage design. The RAD Valve is flow-bench designed, to insure not only maximum air flow at top rpm but also maximum air-speed at all engine speeds. The benefit to the racer is more blast out of corners, and higher revs down the straights. Dyno tests have yielded up to 3 hp increase in power on a 250 mx machine. All RAD Valves come complete with the renowned Boyesen Dual Stage Rad Valve Reeds, and rubber manifold as shown.
N.B. When replacement reeds are required, you must order for
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