I have the Leo Vince slip-ons, and ride mostly in the canyons. I get between 49 - 54 mpg. I wind up runnng mostly 4,000 to 6,000 RPM with a lot of on/off throttle. I filled up yesterday at 180 miles, and was able to get 3.3 gallons in the tank. I am very impressed with the mileage! At my 1000km ...