Welcome to the forum John. You have that set up nicely. Good Job! I am surprised that the gas mileage is so low, but you are right, it will improve as the bike gets broken in. Has the carb been messed with by any chance? One thing I might suggest is taking some oil with you on the trip. If you are going highway speeds for a while, TW's can use some oil. You're going to be glad you took the Airhawk..