I stopped using SeaFoam the second time I nearly burned up my Ducati due to leaking float bowl gaskets. I use ethanol free gasoline in all my vehicles now, with a dose of Stabil in the Beck and the Ducati when I put them up for the winter.
Since I started, it generally takes me about 10 minutes to get the Duc going in the spring, vs half a day before.
Personally, I think Techron is a better fuel additive than SeaFoam.