Hey guys i know this is a dirtbike forum but many of my freinds have fourwheelers so i was hoping i could get a little help with one. Its a 2000 Blaster, we put a pro circuit pipe on it the other day and he rode it down the road and shut it off to put on a coat. When he tried to start it back up it backfires and won't take any gas. It had a "Carbon Ball" in the stock pipe, i had never seen anything like it but several Blasters around here seem to have the same problem. They got a jet kit and had to go all the way lean to get it to run alright. I think it was to lean and it either burned up or is nearly burned up. Since it is the same motor as the RT180 hopefully someone has some experience. Any help is appreciated.