I have seen a thread about it before. I dont know if it was on this site or diygokarts. Someone had put of of those lifan 4speed engines in a doodlebug. It may have been a honda engine or something but either way it has gears. I want to do this to a doodlebug but wanted to see how these engines are mounted. Basically, does anyone have pictures of this setup or the one that is in a thread somewhere?