So I installed my new exhaust system; fatty on the front and turbine core II on the rear. (long story short, I ordered the gnarly for low end torq but the shop gave me the wrong one. Didnt realize till I installed it so I said screw it....) First day at the track it was running well. Tons more power both low and top end. Running great, I loved the new mod! Then after about 2-3 hours of riding something went seriously wrong. I was in mid 5th gear on the long oval fast track when all the sudden the sound of the bike cracked and went into a low pitched rattle or banging sound. (kind of like the sound of the bike with out the tail pipe, but much lower pitched) It was an applified version of a playing card in the spokes of a bicycle, if you will. The bike would run/idle but only if I kept giving it gas. I immediatly pulled of and pushed it to the truck. I thought the engine had blown but there was no smoke or oil leaking. It is almost as if the new exhaust increased the performance so much that the motor could not handle it.
Does anyone have any ideas as to what could have happened. Is it something major? I am being optimistic when I hope that it's an easier and less expensive fix because the engine still runs.
Thanks in advance for the help. And by the way, great site! I was excited to find a community of KX riders on line