I get about 300 miles a tank with a few small mods. Thats mainly motorway miles. Any where from 24 to 28 mpg per tank on the trip computer.
Use it as a dailty drive and love it to death mate! Comfortable as hell, great cruiser and the power and grunt is there when you want it! Sounds bloody amazing when you put your foot down as well mate.
My advice is GO BUY ONE!