Wow, I only ever had a mirror fall of when I had a late custom construction Harley that had a solid mounted bored and stroked 1500cc engine. I ended up having to safety wire most every fastener otherwise it shed part faster than my dog shed fur in the springtime. Compared to that HD this Duc is nearly smooth as glass. Not smooth as my GL1800 but definitely not a 2 cylinder gasoline powered vibrator like the Harley was (Which I understand is why some girls like Harleys so much). Mirrors on my Icon haven't budged. Neither the stock mirrors nor the Duc billet mirrors I mounted about 1,000 miles ago have ever come loose. Over 5,000 miles on the bike. Also, on my 2015 Icon, seems every fastener had a small paint mark to indicate proper torquing or at least perhaps to show if anything might have loosened? Check all the fasteners on your bike. Perhaps whom ever did the set up was not very thorough?