i'm having trouble starting my bike. it starts with the choke on, but as soon as you kick it off it stops. so i taped up some of the air holes so not as much would be running through the filter and it started fine. any suggestions? could a significant amount of air be getting in through somewhere else? is something else obvious it could be? i'm going to get some new gaskets and see if that's the problem, but i figured i'd see what other people thought.