Okay. I am at it again. I have a chinese 80 cc with a 33 tooth rear sprocket. I am still not happy with the acceleration and top speed. I am obsessed with making fast motor BICYCLES. I don't want a dirtbike, moped, or motorcycle. I want to build a bicycle with a motor from a small dirtbike since they have gears attatched to them. The power will still be on the left side of the bicycle so it is still possible to mount the sprocke with no problem. The bike will still have a manuel clutch. It will still be able to ride like a bicycle if the engine is not too big. I dought it will be. Anyway this project will occur in the near future. Please tell me what u think.