I had this happen on my 2010 roadster - Motalita wheel and polished steel boss/horn. At abt 7 months old whilst navigating pot holes on the Hogs Back at 60mph the whole horn assembly landed in my lap and if I put it back in it was so loose it fell out on any bump or on acceleration. My dealer was great and simply replaced the boss with a new one and we had a laugh about it. So far so good and the new one seems to be secure. The dealer too was amazed as usually these have been considerd a very tight fit - perhaps something has been changed with the securing rubber o ring or boss dimensions?
