can someone tell me weber jet sizes versus drill sizes IE mains 145 is it 1.45 mm and say f9 air jet what size hole is that?

Get a set of mini twist drills, Blackspur do a set for a few quid and you can find the size by trial and error and drill them out if you want larger ones. Some here on ebay but you can get them cheaper in tool shops.

[Edited on 6/4/06 by Peteff]