Dayhum! I must be getting old! Way back when I was riding Kawasaki Mach III's and a hotrodded Z-1 I would not have given up one horsepower for ten more MPG! You kidding? Matterfak, as soon as I got my new bike-whatever it was- home I was trying to figure out how to make it faster. Now, I get excited from seeing my calculator showing me 45 MPG.
Still, it would be fun to have that old three banger two stroke back in my garage. Might even want it with expansion chambers on it!