I have a 04 GSXR 600. It ran great until 2 days ago and all of a sudden it wants to die after it´s revved up or while riding it wants to die and it will occasionally shoot a flame out the pipe. It still has good power, all fluids are good and clean( no oil coolant mixture), new plugs no air filter but it was that way when I bought it . mods to my knowledge are PC3 and D&D pipe. I had no problems at all last summer also it seems like it´s running a little rich. My thoughts were that it is TPS PC3 is bad but I unhooked that and I had the same problem. Thanks