Quote: Dropped the bowls soon after and there is almost no fuel in them.
Sounds like you found the problem. Pull the fuel hose at the carb end, stick it in a good size jar and turn on the petcock. If the fuel barely dribbles out, empty the fuel tank as best you can, remove the petcock and clean the screen. If the fuel flows freely, check the filter in the T fitting between the carbs. If the filter is OK, there could be some residue collected in the T fitting. Gas tends to evaporate there and leave crap behind even when the filters are OK.
Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python
