Ive been trying to find the problem on my 954 Ive been told that its the fuel pressure regulator. but a manager of a Suzuki service shop, who just be happened to be buying my gsxr, said to look for bad grounds. Here is what the bike is doing......two weeks ago it ran perfect i took the swing arm off painted it installed new head light <- not the problem. I tried to take it out on a test drive and it idled horrible and drove horrible especially at low rpm.....then i shut it off and it wouldn't start.....when you hit the red run switch it does the normal check but when you hit the start button it either grunts and all lights turn off or it tries to turn over but nothing, you can here gas being sprayed in but no start. any ideas. and thanks in advance for any help.