BOYESEN Radiator Valve YZ125 ’89-’92 RAD-33

Maintain flow velocity through the valve and redirect intake charge for more even distribution to intake ports, Provide quicker, sharper throttle response and more horsepower throughout rpm range, Specially-designed reed cage holds Boyesen’s patented dual-stage reeds, Boyesen’s hot RAD valves ratchet up your torque, One-piece cast aluminum bolts in easily, Order one set per cylinder