I ride a 2003 Goldwing with Motor trike conversion. Over the last 12,000 miles this year on trips we averaged 40 mpg. I always have the wife on board and pull an Escapade trailer with about 400 pounds of gear. From my own experience with the Harley Deuce in my case, I get about 51 to 53 mpg so I think if it were triked ,it would do good as well. Goods mileage is all right at your right hand.
