Best results I've personaly seen is a ZX400 F3 making 78hp. Very rapid. Running the full kit as well as FCR's and a ram air box (as they all tend to these days).

While the NSR (and a few RS's) struggle to make thatsort of power they are both that bit lighter which does go in our favour.

I think Honda claim 75ps from their TT-F3 kit for the NC30.
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If I have to take the carbs off once more...