Take a look at this newly released AMSOIL fuel additive. Formulated to deal with problems with ethanol and water in gasoline, fuel stability, cleaning ability and recommended for two strokes and small engines: http://www.amsoil.com/storefront/aqs.aspx?zo=1181889 .
Additional info at https://www.amsoil.com/dealer/...e_AQS.pdf?zo=1181889 .