I suffer from turbulence behind the screen of my turbo, but it seems to be side-turbulence - not overhead turbulence. Try moving your head from side to side - still looking straight ahead. I'm 5' 9" and find the over-the-screen wind about 2" above my helmet, but I can't get away from the side buffeting, no matter where I position my helmet and head sideways.
I'm seriously thinking of adding side- deflectors, similar to what a lot of later Goldwing owners add to their screens.