Here is a link to Demon's site, I think that you might have the primaries misadjusted.
How are the shafts?
New base gasket?(use the thick one, not the thin one that most kits come with.)
If you can't figure it out get someone that can.
These are great carbs for a street driven car.
Do a bunch of reading before you start tearing away at it.

http://www.thermoquads.com/page204.html