Erwin mentioned MPGs the other day, so I checked mine again. 47+ MPG twice in a row when averaging around 40 to 50 MPH on secondary roads. Both fuel fill-ups done with bike on center, and tank filled up slightly past the filler neck. As others have suggested, I've been keeping the RPMs at around 3500 to 4000, and noticed a significant (3 to 5 MPG) increase in performance and MPG after opening the last two exhaust baffles a might wider. Hope I'm not too lean now.