okay so i have a 30cc friction bike that runs 30 mph, and it runs good. On my next bike it will be chain driven, and i dont need to be able to pedal, but i would like to put a shifter kit or transmission. the motor is a 6.5 hp 4 stroke honda. also i think i should use a mountain bike because that seems to be most realistic. please any suggestions or ideas. my goals to have a bike that i can shift with a clutch.