Ok, I've got a 99 gsxr750. I did the airbox mod, put a tbr full system on, put a [email protected] filter on, took out the middle head gasket, and have the tre mod done. The bike is running really rich and thought I needed to have it tuned on the dyno. The shop guy told me that my powercommander was bad. I've unhooked it and it still is missing badly around 4500 rpm. It was a little flat before I put the pipe on and once on, it became much worse. I thought for sure it needed remapping. He told me it should run fairly good without the powercommander. Do you think he knows what he's talking about? It pulls really good above 5000 rpm, but is really twitchy down low as well. Please help. Anyone have some maps I could try?