There used to be a rubber gasket sort of thing behind the mounting but they deteriorate with age and fall to bits then the mirror pod rattles. I use O-rings over the head of the bolt the pod clips onto. It is the same 1/2 in O-ring that are used on the garden hose connectors and I buy them at the hardware store in packets of 5 so I need 2 packets of course and then loose 4 of them.

Years ago one of my Airhead RS mirror glasses would rattle and vibrate at speed. I couldn't prise the plastic trim apart without marring the surface, or worse, breaking the glass, so I drilled a discreet 5mm hole in the plastic mirror bezel along one edge and inserted a soft, plastic screw in and carefully tightened it until it just made contact with the back of the mirror glass, but not too much tension or you know the result. Voila! No more rattle.

Thanks for the replies.  One both of my mirrors the raddle is big, more like a bolt is raddling around inside?   The sound would be like putting a bolt in a plastic container and shaking it.

plus 1 on installing buffer damper material between the mirror pod and the mount

the capture socket on the pod is an expanding socket and only deforms so far into its depth
as rick says  a washer type thing works well
I have used a section of neoprene with self backing glue on the fairing side trimmed to fit before removing the adhesive backing protector about the right thickness to prevent that distracting rattle

good luck

Behind the mirror



These foam things were behind my mirrors but have gone hard so i made some out of foam, may help.

Inside the pod, which you will have to break apart if you want to go there [well, i had too]

Yes, that is probably the situation with my mirror raddle, and thanks for the picture.  Any recommendations on taking it apart?  Are the two haves just glued together so you carefully pry it apart?

Be aware that the photos are of an RS mirror which is a totally different animal from your RT mirrors.

If you twist the plastic pod it will often come apart.

To remove mine i sprayed WD40 in behind the mirror to hit the center of the mirror mount .... and then used a tool ..Ford door trim removal tool  which is basically a thin slotted tool which will fit into the back of the mirror(available at auto stores to remove door trim panel plugs) .. then put light continuous pressure on the tool and the mirror lens will just popout..guy who painted the bike was amazed as he had previously broken every mirror he tried to remove for painting