Welcome crump47. You haven't mentioned what the engine is running like.Is it rough,and loading up,maybe some black smoke from exhaust? I Believe you have a stuck needle,as in needle and seat in one or both carbs.,and the fuel is overflowing from the carb. vents.and into the overflow system. Try a can of Seafoam into the tank,let the engine run a minute to get the mixture into the carbs. Then let the bike sit a couple days to let this stuff work on the gelled gas holding the needle(s) open,then try'er again. Hoping you won't have to get the carbs. off the thing.Good luck.