Just got done cleaning her Tomos A3 fuel tank ,cleaned carb with new gaskets, New fuel line, and petcock. Proper fuel mix . I took it for a spin, ran good. Later that day she goes to take it out of her garage , she said it stops dead ,tire squeals, leaving rubber on her garage floor! The only thing I did different was use Shell premium in the tank. I'm thinking ,no hoping , it soft seized. I've read here, and there, to use hi test cause of ethanol. Was that wrong? BTW, I havent been able to check it out yet. Any thoughts?