Welcome Area OnlyNew Member Welcome Area Only. Be sure to pop in here and introduce yourself & let us know what Harley Davidson you own. Save your bike related questions for the proper area.
Welcome from Coastal Ga... Todays gas has so many additives that there is basically no reason to put in any after market cleaning agent. Unless extreme conditions, bike sat for years, you put in some crap grade of gas. This is not your Grandpa's gas that turns to varnish after a few months.
Welcome from Jacksonville, Florida! Unless you're having some trouble, they likely don't need it. Most all gasolines today have additives already in them. But if you want to, just double up on some Seafoam and run a tank through it.