imported post
To fix your problem,[follow these steps if you have an original radio and speakers] remove front turn signal assembly, remove the speaker. There are two nuts behind speaker that you need to control to keep from loosing.
After mirrors have been removed,there is a screw that can be tightened.Found that mine were too short so had to drill and tap,installed longer screw.
If the loose part is on the upper part of mirror:readit:[this can be dangerous to your health so you will want to be careful and use safety gear when you attempt to do this part,[a disclaimer of responsibility for injury to your self and people around you by following my methods]. Remove mirror assembly from fairing,immerse mirror head in hot water to heat up and soften gasket material. Gently and carefully remove mirror and gasket at the same time,screw is behind the mirror.
Welcome to the forum and good luck with your mirrors. Exercise caution but if you break mirror go to
www.partsnmore.com or
www.jcwhitney.com or any number of sites for replacement mirror assembly.