I have been having the same problem, I found that if you go to the back side with a screwdriver and push in around the edge by the ball but on the on edge of backside of mirror, all around , it tightens it up, give it a try!

 

Unless it has screws in the back, toss it. They're cheap.

 

no need to toss, when it takes about 30 seconds to repair.

 

If Sloghog's way doesn't work, just adjust it the way you want and put some super glue around where the ball fits the mirror housing. That will keep it in place for a long time. Please clean with alcohol first.

 

Local auto parts store and buy the green loctite. It's designed to WICK into places. You can clean the ball area with alcohol and blow dry then take a toothpick and apply some green around the ball. It will wick into place and tighten up the fit. Had a buddy with an older, very old, gold wing and the mirrors, both, did the same except his was worse as even sitting with engine off they would not hold the upright position set by hand. He did this and they hold perfectly now.

I've used this on my rear foot pegs on my sportie too when they seem to flop down at highway speeds and vibrations. I applied it 2 times in a few days to the pegs and now they are nice and tight into the up position but allow you to move them downward for 2 up riding.

I'd not throw the mirror away. This is usually an easy fix.

GOOD LUCK!

 

since all you guys have so much money that you just throw away good parts, could you please send them to me? I will repair and sell at swap meet and make a few bucks, maybe sell you back your own mirror>

 

Def have to replace

 

If you do buy green loctite, after using it, store it under lock and key with a note reading "never use on threads or parts you may want to loosen or re-use someday".
Made the mistake of using Green (sleeve compound) on a rifle scope mount once...

 

YEAH! Green on those...not good. I'da used the purple. Anything firearm related the purple is the stuff.

Never mistake GREEN for your average hold stuff. IT is wicked but in the right places it is what it takes.

Ride safe!