Reed Valve Motoforce Racing Evo Minarelli horizontal Motoforce Racing Evo reed valve with 4 reed blades for scooters with horizontal Minarelli engines such as MBK Nitro and Yamaha Aerox. Thanks to the "V"-shaped design and the Venturi stuffer, cylinder filling is optimized, which improves throttle response. Tuning reed valves are essential for tuned two-stroke engines and increase performance at all engine speeds, especially in combination with a PWK carburetor. The precise workmanship guarantees an even surface and perfect sealing. Supplied with 2 paper gaskets. In summary, this product significantly improves the performance of sports and racing engines at low cost. Details of Motoforce Racing Evo Reed valve: Racing reed valve Ideal for sports and racing engines Blades: Carbon Thickness of blades: 0.30 mm For Minarelli horizontal