ok so we were out riding thursday night and all of a sudden a hear this weird noise and then it started to run on 1 cylinder. so we jsut thought that it had a plug fouled so we changed it and it still did it. and if u got the rpms up high enough it would i guess, or it felt like that it would run on 2 cylinders, but when ud slow down itd go to 1 cylinder. so we get back to teh hotel and get to looking and we noticed that one of the exaust bolts on the exaust manifold had came out and caused air to get in and make it run lean. causing it to prolly burn a hole in the piston. so anywho what im getting at is has anoyone else had this happen to them??? and if not i would go and check yours to make sure that they are tight.