My bike had just about every problem posted here on the forum.I've been reading all of the tech threads and have fixed several problems already,thanks to all the great info here.I had a bad popping issue when I first got the bike,biggest problem was a cracked "Y" pipe.I picked up a new exhaust system from pinwall for $200.00.changed out the bad pipe and the poping was not as bad but still there.Did a carb sync,got a little better.I suspect the after market mufflers are the cause of whats left of the popping.I also pluged the AIS this just made it the worse,took the plugs out.I to believe if it ain't broke don't fix it.It was designed that way for a reason.I'm going to put the stock mufflers on that I picked up at pinwalls and see what that does.Theres a lot of great info here,don't sweat the small stuff it's all in fun.