Topic: 7A carbs: correct "T" fuel connectors

[34barab]

Bought a set of 7A carbs supposedly from 71 CB750K1.  While going through them, found some discrepancies.  First attached pic shows the T's from the 7A (1971) carbs.  One T takes two o-rings and one takes four.  Both have 5 mm ID.  Partzilla schematic shows two o-rings per T.  Parts book for 1969 shows same.

Second pic shows T's from 7A on the left, and the T from 064A carbs (1973) on the right.  ID of the 7A is 5 mm, 064A is 4 mm.

What is correct for the 7A - two or four o-rings per T?
Is 5 mm ID correct for the 7A? T from later carb has 4 mm ID. 

[my name is nobody]

I've never measured them, but the tees in my set of 7a have 4 o rings, and as far as I know,
they are factory correct.

[WhyNot2]

I have both sets of carbs and they both have the 4 o-ring setup.

[Doobie]

I've disassembled several sets of carbs and the only Ts I've seen take four gaskets.