It sounds like you are saying:
0 to 4,500 rpm runs like it's starving.
4,500 to redline it's normal.
If that is what you are saying = Uninstall the pc from the hot side. Injectors still make a ground or resistance you keep pulling the pc ground off and the same problem still exists. Pull hot off, not the ground on the pc... Make sense?
I am a computer bike. I am low/mid-mid/high kind of map. I sputter all up to mid/mid changes to running BETTER. Well, it sure sounds like a map scheduling in the low/mid range. 0 to 4,500 is almost there. Or say where the pc map is layering over some bad cell numbers?
It can't be bad plugs, if it cleans up from mid to high. It can't be the fuel pump, if the pressure is at the top rpm range? So, spark/fuel have been addressed. Compression is a given, being it starts for now. Can't be a bad ground if it cleans up at the top, remains consistent at 0-4,500rpm range all misfiring whatever. Can't be a rat's nest you switching pipes, being it cleans up at the upper end.
And no damage to bike you beat crap out of it without piggy. Especially slips.
Tormenting the motorcycling community one post at a time