Working closely together with the US manufacturer Moto Tassinari, who is famous for high performing reed valves in the field of motocross engines, this V-Force 3 has been developed. This construction of the double V-Reeds is patented and thanks to its huge inlet diameter and an optimized airflow, its provides much better filling of the crankcase. To ensure maximum power output, you should fit the 28 mm Venturi insert that is included in the package. An evolution for 50 cc two-stroke automatic engines Compatible with: - Aprilia: Area 51_S, Rally 50 AC_S, Rally 50 LC_S, Scarabeo 50 Min.AC_S, Sonic 50 AC_S, Sonic 50 LC_S, SR 50 Min.LC_S - Beta: Ark 50 AC_S, Ark 50 LC_S - Malaguti: Centro 50 AC_S, F10_S, F12 AC_S, F12 LC_S, F15 Firefox_S - Mbk: Mach G 50 AC_S, Mach G 50 LC_S, Nitro 50_S, Ovetto_S - Yamaha: AEROX 50_S