I believe this isn't a jetting issue but the fact that the airbox was removed and the pressuring mechanism disconnected could well be the source of the problem. I think the ZX-7 carbs have pressurized bowls. I don't know a lot about this model but believe ari_one is correct. I believe this model has a user group and would find it and find out more on this subject.
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wiredgeorge
Texas Hill Country
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