Yes the bike complies but motards are not allowed in f3, pro twins etc. No matter whether or not they comply with the engine regs. They banned motards from all road racing classes bar the purpose made motard class because they are too dangerous to race with normal race bikes.
If you look hard enough you will find the rule. I can't be bothered looking though, sorryI think it reads something along the lines of "any bike with a handlebar height greater than XXX is not eligible for f3, f2, f1 etc"
Edit: Just re-read your post (had a mans read) and you prob do have a point but I very much doubt that you would be allowed to race it seeing as pro twins always is raced with F3, off the same start etc. This is at club level and national level. You should clarify your interpretation first.
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