I wonder what one of these would do, with a streamlined fairing
http://www.piaggiousa.com/scooters.p...io%20MP3%20250
This 250 is rated at 60-65 mpg.
In Europe, we can get the 125 version as a hybrid, and it's rated at 140 mpg (US).
Not streamlined, it'd struggle to get up to 70 mph in a headwind however.
The beautiful thing about it, is that it can be balanced on the twin front wheels - eliminating the need to put one's feet down while being stopped.
This in turn would allow a fully streamlined fairing.