Here are the instructions:
http://www.zamacarb.com/images/techsupport/DisassemblyC1U.pdf
That manual says use a spray type carburetor cleaner. I would avoid vinegar or anything else that is both corrosive and water-based.
Here is the how-it-works book:
http://www.zamacarb.com/pdfs/TechGuide_2007.pdf