39.5 Highway MPG - 2013 Versys 650 - 43 tooth rear sprocket
My commute is mostly highway (25 miles one way) with about 3 miles of city driving at 40mph. I changed my rear sprocket to 43 teeth because I wanted longer gearing and I spend almost all my highway time at 80mph. The revs are fairly high at this speed and my mileage has not been that great - I have been averaging about 39.5 mpg over 6 tanks of fuel.
I see on fuelly.com that the average for this year bike is about 45 mpg, with other near 60mpg. Is just my speed making this terrible mpg?
Side notes: the bike has almost 10k miles, just did new spark plugs, coolant, oil and filter, and cleaned the air filter before these tanks of fuel. I ride with a Givi windscreen and no side or top cases, just myself (185lbs) and a backpack.