After a recent service to my bike, I've noticed quite the performance change...and not for the better. Here's a quick backstory: I have a 2001 VFR with a Staintune exhaust and PowerCommander III with just under 14k on it. I recently cleaned the oil sump screen and had to replace the oil pressure sensor thanks to some rodents who decided to chew through it, so to do both of these things I had the exhaust completely off the bike as well as the fuel tank, air box, and throttle bodies. I got the bike back together and everything seemed fine: bike started right up, sounded great, rode it around the block a few times, no issues. The next day I decided to ride it to work (about 25 mi) and roughly halfway there I heard the sound of the exhaust change (to a much lower tone) and immediately lost performance. The engine was still running smoothly and I still had decent throttle response but just a huge lack of power. On the way home the same thing happened. To me it seems as though it's somehow temperature related since it happens after the bike is warmed up. I thought that perhaps I didn't have part of the exhaust seated correctly and that as the pipes got hot it opens a leak around one of the gaskets but I couldn't find a leak anywhere. If it was an issue with the PowerCommader I would think it would happen on start up. This really has me scratching my head. If anyone has had this issue and can point me in the right direction I'd really appreciate it. Thanks!