Exhaust leaks maybe, mine sounds like a cannon going off now since I put on the slipons. I need a remap too though. I still have the stock ecu.jon super said::lao Been a member there for over almost two years now. Don't post that much anymore since I haven't modded my bike much lately - although I need to ask the gurus what is causing all the popping and backfiring on decel.
A great forum for us TL owners for sure.