Fixing stripped threads on mirror

The threads on the hole the right hand mirror screws into are stripped. Normally I would replace them but that would mean replacing the M/C and re doing the front brakes. I would like to stay away from that if possible. Any body got a way to fix this while keeping it adjustable? I was thinking about putting a bolt through the whole thing and into the bottom of the mirror.

 

I did the Heli-Coil insert on mine while rebuilding the Master Cylinder. Found the M10 1.25mm kit on Amazon for around $30.

Here's a link:
http://www.amazon.com/M10-1-25-Perma-Co ... 0+1.25+kit

Once you perform the repair you will be converting to right hand thread, which means you'll have to get an aftermarket mirror to fit.

On the plus side, if you chose to venture away from the stock style mirrors, you'll have many more choices to find ones that you like that will fit.

 

Hey Bobby,
About twenty years ago I had the same issue on my left mirror. I used JB Weld and it's still holding. Of course there isn't any adjustment at the mount so what I did was set the right mirror where it was suppose to be and matched the left and let it dry over night. Good fix for me as I never had any intentions of changing to after market mirrors. If that's a choice for your future then the Heli-Coil would be your best option. I just looked at my MC and don't see where a bolt through setup would be and option...

Good Luck...

 

I would have to drill a home through the bottom of where the mirror mounts and into the base of the mirror. I'd like to keep it adjustable in the case I ever decide to sell it. I don't see this happening anytime soon, but you never know.

 

Is there enough left to re-tap the hole? Might have to drill through to allow the tap to go all the way through, but would work if theres enough meat left.

left hand taps are available to make keeping the original mirror a possibility.

i would keep it adjustable like you said, you never know.

 

Clean out the hole real well. Oil the stud on the base of the mirror then wrap in teflon tape. Fill the hole with JB Weld and thread the mirror in. After it set remove the mirror to clean off the oil and tape. The JB weld will leave threads in the hole.

 

The mirror wiggles around quite a bit in the hole, so I dont think there is any possibiltiy or re tapping it. Iwingameover, this sounds like a good idea. And I think I have everything needed to get this done except maybe the JBWeld, but that can be picked up pretty easily. Your saying FILL the hole so that when I thread the mirror in, it will force excess out?

Thanks,
Bob

 

Heli-coil is the way to go. Right or left hand thread, standard or metric available. Bought a kit that came with the right size drill bit at a Napa auto parts for about 25 to 30 bucks.

 

you don't need to fill the hole but you do want to make sure there is enough in there so you fill up all the area left from the missing threads (better to have extra than not enough. If you fill the hole completely your going to have a ton of excess to clean up when you put the mirror in.

did the jb weld fix a few years ago for a friend and its holding strong.

 

When I got my bike, the right mirror was loose. JB weld method. Once the mirror gets bumped the jb weld won't hold tight anymore. Then you get to chip some out and start over. Fix it right the first time and be done with it. If you use the right hand thread, you can pick from any aftermarket set with many styles.

 

You can also get an aux mirror mount adapter like this one. They also have an adapter that mounts the mirror to the Left if you desire. Bad news is that you will need to get a mirror that fits a Honda/Kawasaki/Suzuki rather than a Yamaha, but good news is that this will also work with any replacement master cylinder that does not have a mirror mount (like one from a faired bike).