I have a 2006 Z1000 (FR) with many mods (full exhaust, ZX9R cams, secondary butterflies removed, Power commander...) and the ECU is a purple label 21175-0051 (immobiliser version).
I want: -Remove the Deceleration Fuel Cutoff
-Put the 2005 Z750 ignition table
-Raise the limiter (if I put stronger zx9r double springs valve)
I ve made a test with a Z750 21175-0016 ECU (non immobiliser version) and the bike doesn't start.
Z750 21175-0016 ECU although it looks exactly the same,it has a totally different pinout. You probably fried that ECU the moment you switched the ignition on.