Mike (GTI20VTurbo) created the hi-tech/homemade airwing. At least they look hi-tech. I don't know what the vortex generators contribute but they look terrific. The wing isn't adjustable but its trailing edge is bent to direct air towards the pilot. http://www.pbase.com/elvin315/image/46279861
I found these on a bike for sale on eBay. This owner added homemade adjustable airwings to the Kawasaki Fairing Extenders for added cold/wet weather protection with the option of directing cooling air into the cockpit when temps rise. Very smart. Look at the pictures titled "Found on eBay". http://www.pbase.com/elvin315/concours_27&page=4