My 06 is a carb bike.45-48 mpg.It is what it is.I get 135 miles til I run out on the main tank and switch to reserve.that is 3 gal in my tank.I have never gotten more then 4.2 gal in my tank even the one time I ran it almost dry.I also havnt gotten 48 mpg for a while either cause I dont ride like an ole man