BOYESEN Radiator Valve RAD42E

Developed with Factory Yamaha, Pro Circuit, Factory Kawasaki of Europe, Factory KTM and top pros like Jeremy McGrath, Sebastian Tortelli and many others, Maintain flow velocity through the valve and redirect intake charge for even distribution to intake ports, Made of one-piece aluminum casting and bolts in easily; no modifications necessary, Specially designed reed cage now comes with carbon fiber Pro Series reeds, Pull a gear higher on uphills; instant acceleration makes passing effortless