Decided to get to a motor I picked up a few years back. Hooked it all up and had no spark. I swaped over a spare cdi still no spark , so I cleaned points and now I get a motor that wants to start but wont. It also sometimes has a bad backfire thorugh the exhaust. Im a lil stumped. I will be doing a carb clean. I noticed that #3 carb leaks gas from the over flow when primed and ball does not get "hard" im assumeing because of this. Anyone have any ideas about whays goin on