Carburetor jets

please be patient with me as I am not much of a mechanic and could make a mistake when referring to the proper name of a part.I am trying to assemble the carburetors on my 1982 Yamaha Maxim 650 and forgot what went where. While the four carbs are on my work bench and the air box side is closet to me the first thing I see is the needle and seat (where the gas float is connected) the next thing looking toward the butterfly in the carburetor is what I would call a round tower with a brass jet screwed into it and a washer under it. The next tower which is shorter also had a brass jet screwed into it, but does not have a washer. I have eight of these brass jets that can fit into either tower; does it make a difference which jet goes into which tower?

 

On the head of the jets, there should be some numbers stamped into the metal. VERY small numbers, for the 650 they would normally be 110 or 112 depending on year and which country the bike was sold in, and 40. The 110 jet goes with the washer on the main tube (this is the MAIN fuel jet) and the one numbered 40 goes on the other tube without a washer (this is the PILOT fuel jet).

I did the exact same thing when I started pulling my carbs the first time.

 

or to put it another way, the one with the bigger hole goes on the tall tower with a washer(main jet) the other one goes in the other hole(pilot jet)