Did OP ever get this sorted?
Is there a specific reason you think its the injectors? I had a similar issue once when I had attempted to make the exhaust servo motor always open. I had welded the valve open and removed the servo itself, worked like a charm for a while till the weld broke, then I had no power in higher RPM.
My point is there could be MANY reasons for the bike to act this way, just curious how you got to the secondary injectors.
Also, are there any mods to the bike.