Surely it would depend on the tune of the bike? If the bike can suck all it needs thought the standard carbs then my thoughts are they wont be any better....although they are a dam sight easier to re-jet than standard carbs.

The main problem I find with my PJ38s is the lack or any idle circuit. F3 carbs have to be the way to go but and harder and presumably more expensive to find.

I really cant see standard NSR carbs producing the same power as the Pjs on Toms bike, the F3 ones however may be a different matter.....what are the differences with the standard and F3 carbs?