no, I had one of those. they arent right for that model. look nothing like em. I had a late 80's ZX10, and remember em well. I stand by my guess of CBR.
You're probably right. I was at my Honda dealer and saw a set of carbs for a 94 CBR1000 that had the same black tops on the vacuum chamber. The carbs for the 93-96 CBR1000 are completely different from the ones on the 87-91.