My bike was used when she was purchased and was mostly stock with the exception of vance and hines pipes. I was getting at best 38-40 MPG avg. After adding the BAK and ported intake the variance is greater but I have gotten close to 50 MPG, but my avg is about 45. I got the best mileage on a ride in North Carlona on the Blue Ridge Parkway. It is a scenic Road where the road is heavily monitored for speed and the limit is 45. If most of my tank is burnt on the interstate and I run a avg speed of 70-75 then it drops to about 44.

I am far from a expert on jetting and carb set ups , but I think if the carb is set up properly and you run at normal crusing, 60-65, you should be getting at least 42-47 mpg. But if you stay on it mileage will drop dramatically.

After the BAK, Intake and the baffles were removed I stayed on it alot and only got around 35. But I loved the sound and really rode it hard. So I guess milage will vary depending on riding style and carb set up.