I just recently developed a high rpm sputter on my 2001 426. bike sat for about a month (had a broke subframe bolt to fix) and when I fixed it and started it now has this sputter. I noticed when I was doing my subframe that my exhaust band clamp was loose and exhaust could just be pulled off by hand. So I tightened it all back up and while it has got rid of my popping on decel, it makes it to where when i open it up with the rpms up it misses and kinda sputters. Any ideas what this may be? maybe jetting is off now?