SeaFoam dissolves varnish, so I would guess that it did its job on your carbs. I would recommend a thorough cleaning, possibly rebuilding them. SeaFoam does many things, but it does not cause leaks in carbs. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII