I am re-listing under the repair formun. I have a 1989 tomos bullet with 1042miles. I have cleared and cleaned the fuel system, and changed the transfluid(which looked good and at the correct level. The bike starts fine and idles smooth, when I start to drive it will go the about 10mph and then start knocking like crazy and no more acceleration. The engine also knocks to a stop when I shut it down. I starts again without trouble. Also it doesnt shift into second gear.