Clapbox V-FORCE VForce4Ri Yamaha YZ85

The Moto Tassinari VForce valve boxes are a reference for the 2-stroke engine preparation specialists for more than 10 years. The VForce4Ri valves allow to increase the engine power and the reactivity of the gas, thanks to the improved efficiency of the intake system compared to the original valves. Vforce4 Characteristics : New carbon fibre slapsPre-incurved valves ensuring better watertightness Wider slapbox for better air circulationWhat combined slaps increased by 10.5% to promote and increase the overall air circulationAerodynamic filter at the end of the box to increase the air velocity of the external intake apertures. 5.5% Specificities Vforce4Ri: Rubber overloaded on the surface of the end of the valves to increase the life of the intake valvesCollector, damper box and air deflector are specially designed for the VFVorce4RVenturi system specifically designed to improve the flow of the mixture and thus performance