In Stock Derbi Euro 3 Reed block V4R Metrakit by VForce (V4R81A) 924C0100 €181.44 Reed valve box adaptable to:METRAKIT Pro Race and Hiper Pro crankcaseHonda CR 80/85 1980 / 2007The new 4VR Metrakit reed valve box offers greater reed durability thanks to the rubber coating on the reed valve box tips and the enlarged reed stops. Add to cart