the carbs do differ, the bodies are different... I'm suspecting you do have zx 900 A2 carbs, or zx1000 A1
neither have aircut valves, the differences in the actual jetting, is to overcome losses in accell/decell issues due to this fact, and also the Ninja chaindrive models had a different need than the conni, as they were a bit more fuel consuming...
see the addon, and shoot me a note if it does'nt work, and I'll send the diagrams and p/l's to you...
we did a lot of research on these carbs a dozen years ago, when we were "hotrodding" and modding the bike, trying to pump more fuel into it... funny, because we now find it can excede those gains, with much less fuel, and correct airflow.
check this out, let me know if it doesnt link..