There is a screw that holds the mirror houseing to the stem. Unless it is totally broke you can put the mirrior head in boiling hot water[mirror in the water before heating it] and safely remove the mirror to access the screw. Take your time and you can get it apart without breaking it.
fairing mounted and thank you I will try the hot water trick. I got caught in a snow fall on a up hill and as I was backing up to turn around my foot slipped and the mirror hit the curb the was the only thing that got damage as the bars around the motor saved all the rest like they are to do
I may have a spare. Which mirror got broke? If I do have on eit will be in my garage, unfortunately my garage and my house are't in te same place. I ill be getting over y my garage Tuesday. I'll look then to see if I have the one you need. If I do you can have it for $15+shipping.
If it's just the stem that's damaged I may have that as well. Jus tle tme know what you need and I'll see what I have. I know I also have a spare glass. It's the flat one not the convex.