after aobut 2 months of not riding my shee ,it started with about 20 kicks,it was smoking as usual but then i took it around the track a few times and it was back fireing like hell so i pulled of the track and gave it just enough gas to keep it at a high idol then it just died and didnt start back up,im gonna take a guess that it was gummed up but im not entirely sure, and help would be great thanks