swapping carb bits

[Stevepshipley]

Hi all,
I'm currently restoring 2 S2 TV175's, my plan is to keep them standard and see how they ride. One has the uprated 21mm BS7 carb and the other has the older 21mm BS5.
I've read somewhere the BS5 is prone to flooding. I've found a 19mm BS7 in my pile of odds and sods, so the question is can I simply swap the float mechanism from the 19mm BS7 and upgrade the 21mm BS5? Or am I missing something obvious?

cheers Steve

[Mitch]

Yes