Its a crap shoot with this Bike

[the Ferret]

Cbfan has a point. Now that I think about it on my gen 1 FZ-1 at certain rpms, the inner fairing covers would vibrate against the outer fairing and that could be felt thru the bars. The fix was a piece of sticky backed foam wedged between the inner and out fairings. Buzz gone.

Have you tried it without your windshield?