I know things... A lot of things.
Join Date: Feb 2015
Motorcycle: GSXR 750 K4
Re: How to stop fairing rattling above headlight
What sort of fasteners do you have, fixing the windscreen to the fairing? The well-nuts normally used should take care of that, if properly installed. Their top, rubber washer-like surface is supposed to go between the fairing and wind shield, which should dampen any vibrations and you should also have relatively soft/flexible washers to go under the screws on the top side of the shield. They also shouldn't be tightened down too much, just enough to get the well-nut to bulge.
That said, they can still rattle, depending on their quality. An aftermarket set I got a while ago, had relatively thin surfaces and kept buzzing, until it stopped for some reason. Try making sure they're properly installed, and varying their tension and see if that helps.