Rok Shifter comes to the light to accomplish the needs of those several drivers who wish to compete in a category with the gear box, in a well-known and very well managed championship such as the Rok Cup, facing affordable expenses and steady regulations in the time. Rok Shifter engine comes from the long standing and winning Vortex experience in the field with the two-stroke-kart engines and just after the many times winning RVXX 125 engine.
