Hard to say.........
Are the carbs close jetted yet??
has it ever run in this set up or are you just doing a fine tune??
read here
http://www.redlineweber.com/html/Tech/idf_adjustment_controls.htm
and
http://www.aircooled.net/gnrlsite/resource/articles/dualcarb.htm
and if you need to jet them or at least get an undestanding of jetting
read this
http://www.aircooled.net/gnrlsite/resource/articles/jetting.htm
Whatever - get a synchrometer. Just SOOOO.... much easier
http://www.aircooled.net/new-bin/viewproductdetail.php?keyword2=TZE0021&cartid=0228200695521629
Its all easy enough to learn
Just harder if it is a daily driver and it aint running to start with