Honda BF 90 LRTA 1987 BBBL-10002140 ----- Carburetor Components

KEI HIN Carb housing 40A[A] KA12
Piece in question is the Idle tube (Clymer Manuel B757-2 pg. 228, pic 39 part 14) Idle tube Honda part # 16150-ZWI-000 code 4897781 THE BIG QUESTION ???
Does this tube have a hole all the way thru of some size ????
One end will take a large wire approx. 7/8 the length....The other end feels like there is a step to a center depression about 1/2" in from the end. This can be felt with a fine wire. The big question is should this be a clear hole and if so what diameter should it be? The number on the side of the tube is 40E. Does that mean it was drilled with a number 40 drill or maybe .040 in dia.???? Can't imagine something would get past filters and plug this !!!
Thanks for the Help in Advance
Charles

Problem solved...yes there is a hole thru the idle tube. The hole is .0160 or a # 78 drill Came to this conclusion by disassembling another carb while waiting for an answer. The tube was plugged with a spec of ??? Could not push out with a wire so I went the drill route, actuly had to drill it out. Yes I sized it with the other tube, no I did not enlarge the hole. Now to find a new O'ring that will work on the end of the tube.
Charles