I’ve got a 95CI kit with a PCIII, S&S gear driven TW25 cams, SE airbox and touring mufflers. At 60MPH I average about 42 MPG. That’s about the best I ever do. Hauling the trailer at 80 I get about 27 MPG.
My Yamaha Zuma scooter, however, gets as much as 90 MPG unless I really flog it (which I always do).
The V-Strom averages 45 MPG. It seems to like about 4,500 RPM steadily for max mileage.
The 1948 HD Panhead maxes out at about 40MPH and my ‘72 Triumph is good for 45-57.
My next bike will be some sort of 250 4-stroke model like a Rebel. That should get max mileage and go fast enough to commute the 15 miles to work without using much gas.
The Bagger gets the best mileage, for me. The others, not so much . . .
One of my riding buddies got himself a Geezer Glide last year. Now he’s trying to talk me into getting trailers to haul the camping gear. I gotta ask; ever have a moment when you wished that trailer wasn’t there? Do they ever do anything spooky?
Granted, the Bagger platform is as stable as they come, but still . . .