Safety First. Does your Volvo have the sunroof? Probably similar effect, but not exposed to the other drivers. I often crack mine open even in winter, it's great.

I have a buddy with a Ducati. That returns ca. 40 mpg. I get at least 25 mpg. in my 745 and stay belted up and inside.

You can fit 225/50 tires on your swept alum. wheels. Inflate them all the way to 44 psi, even 51 psi if they are Michelins, that keeps the sidewalls stiffer on the big circular on ramps, and drive your Volvo like that for awhile. If you have the sway bars front and rear, then maybe this constellation will allow you to want the bike no longer. And you can still carry bags of concrete and haul a boat with your vehicle when you need to.