Taft can make anything. Lol. It all depends on your application and how its built. I know Tim's boy, Ben, ran a yz250 at paradise that Tim built for Jack Burroughs. It was Taft cases and jack shaft. This thing was RIDICULOUSLY fast. A little more time on it and setup and Ben woulda had a real shot at that alcohol wankel. But keep in mind, Taft does cases and eliminates the tranny. It is a very nice piece. But its not just a ''mount''