Hi Kaine
In my opinion your carbs will need a thorough cleaning as they have stood for a long time.The flooding is more than likely down to dirty needle valves not sitting properly,or could be you've not set float height right.
if it were me i would strip the carbs completly,removing needle valve,main jet,air screw and anything else thats removable
I would then boil the carb bodys and bowls in a pan of boiling water with a dishwasher tablet in it,leave it simmering for half an hour,then repeat this with clean water(no detergent).rinse and repeat agian.
This is how i clean my carbs(works for me)
have posted a link showing the basics of a carb:
http://www.mikuni.com/pdf/vmmanual.pdf