You don't need a motorcycle.
It's been decided.
I just sold off one of 7 in the garage that was sitting idle. The Yamaha XT250 was good for 80 MPG on regular gas. That leaves the TW200 as the last carbuerated dual sport with 80 MPG in the garage. The rest are street bikes that run on 91 octane minimum. 2 Harleys, 2 Kawasakis, 1 Yamaha Roadliner, 1 Piaggio BV500. All get 42 to 55 MPG.