Honda claimed 75ps from a full TT-F3 NC30. Honda are pretty close with their figures so maybe around 72-73rwhp. Cant say Ive seen many full F3 NC30's though mind.

Taking that into account I can see the possibility of a 80hp+ ish V4 given the full works. Cant see much more than that though.
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If I have to take the carbs off once more...