Reply to "Weber carbs - owners speak out"

Virtually everything is changeable in the carbs.
If they are stock they should be: chokes 37mm (aka auxilliary venturi), idle jet 70F10 (idle jet holder-there's only one and you got it), main fuel is probably 1.25mm (we call it a 125), air corrector is probalby 1.35, emullsion tube is a F11, pump jet is a .50.
What I recommend you get is the following; leave the chokes alome, leave them at 37mm; get 1.40 fuel jets, 1.60 air correctors, F5 tubes, .80 or even 1.0 pump jets, high pressure fuel inlet valves, asbestos heat insulating base gaskets.
How old are the carbs? Webers aren't like Holleys. They virtually have no gaskets to speak of to leak. The main gasket is paper but rarely needs to be replaced. There are ball bearings on the throttle shafts that have a leather seal on them. If the carbs are not new then you need to remove the shaft nylock nuts, carefully remove the slat washers (use a dental pick), even move carefully peel back the leather seals but don't remove them. Load your little grease gun up and use the needle tip and pack the bearing with grease. Make sure that the throttle shafts work free and easy and snap closed.verify at this point that they open completely, 90 with no binding. I have seen more then a few IDA's with twisted throttle shafts. It's best to find out now if you have one. Put the flat washers back on and snug the nuts on gentally.
Theere is a guy on ebay that I get my jets and emulsion tubes from.
He is in Italy and go by the name of Alfaparts. Do an ebay advanced search for sellers using that name and you will find him. His name is Garielle (like the Angel). He doesn't deal in IDA parts specifically, they are DCOE parts.
He sells the jets for $2.50 each instead of $5 each like here. I think I paid $20 for the set of 8 F5 emulsion tubes. Treat him politely he is a gentlemen.
Chokes are harder to come buy. The only other size you may want to try are 42mm on the street. Of course if you want to seriously go racing 44 or 45mm are what you want. You won't be happy on the street with those.
You can get the gaskets from a vendor on www.the samba.com. It is a VW website. I don't rember his name at the momemt, but he is a California type surfer dude. The are called "glass ball" inlet valves. They are like $30 or $40 for the set.
You really don't need the "rebuild kits" for the carbs. Only buy one at a time as you need them.