thats the same power i am trying to make. i am using stock cyliders. my top end and bottom end might have 8hrs on it so i am going to try and reuse my piston and maybe rings. i dont want to loose all my bottom end so i will probably go with dune port and inframe cpi's unless the agressive dune port wont be a big noticeable loss of bottom end. i still like to trail ride and climb dirt hills so i need some bottom end.