I have a 03 636 that I am having some issues with. Especially low end power. It's a stunt bike so it's need all it's power at the low end. I've tried a few things and the last one that I want to see is if my after market exhaust and air filter affect it as drastically as I think they might. If anyone has a PC that I can borrow for a few days to see if it makes a difference I'd appreciate it. For those of you who know me know that I won't run away with it and I don't mind leaving a deposit. Thanks.