Check out someone with an Aeroflow screen on an R12. They are noted for quiet rides, and minimizing wind. The downside is that they are hot in summer. I had one on my R11 and I could get it really quiet by adjusting the height. Too hot for me in the summer.
Vinny G. '09 R1200RT '96 R11RT bought "before they were here" (now gone)
"Nobody sees a flower. We haven't the time, and to see takes time, like to have a friend takes time." Georgia O'Keeffe