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Discussion Starter · #1 ·
Hi ,

On my honda CB 900F the left caliper retain pin is stuck.
I forced it too much trying to get it out, with a 5mm socket hex.
Now the screw threads are worn out and a 6mm won't fit.
I need a way to get it out, any of your experiences would help

Thanks so much

Ralph
 

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Dab of metallic epoxy (READ: JB Weld), fit the 5mm wrench, wait for cure, turn out.

Or a Tig Welder and a steady hand - build up a "knot" of weld metal on top of the screw, let it stop glowing; heat helps free it, the knot of metal is a good place to grab with visegrip pliers & turn out.

BOTH methods require a new pin afterward, of course (but you already realize you need one, yes?)

(on second thought - buy enough pins for BOTH calipers - the other one is just as bad)

Good Luck.
 

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Discussion Starter · #3 ·
Dear sir

Thanks for you kind feedback
I am interested in the JB Weld option,
Are you tell me to put the socket wrench bit 5mm with the putty in the top of the stuck screw ? the slide pin is the kind of style where it goes in the metal housing of the caliper and there is a cover nut that goes over it to prevent accidental drop-out of that slide pin.

JB weld should dry 24 hours , how would I do this then ?
You are so right about the other side too needing new screws

Thanks for your help
 

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Discussion Starter · #5 ·
If the JB weld goes in the the threads then the safety nut won't be able to go in again , the whole work area is so small
 

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,
Are you tell me to put the socket wrench bit 5mm with the putty in the top of the stuck screw ?
This.

JB weld is only one epoxy, but perhaps the most common one. There is a 5-minute version. Essentially, you want to epoxy the hex-wrench into the top of the capscrew. If done properly, you will probably lose the future use of that wrench, as it well be "stuck" tight. If it gets it out, it will be worth it.

Avoid getting any on the threads or anywhere else you do not want it, as once it's cured it will probably damage the finish getting it back off.

Looking at the photo helps a bit too (there are like, eleventy-billion different calipers on bikes)

This is the retaining-pin in the middle of the caliper, holding the pads in place, correct? Can you get-ahold of the pin "in the middle" (next to the pads) with say a needlenose visegrip pliers to twist it and break it loose? It would not be necessary to do anything else (except maybe dress the marks with a file a bit so as not to gall-up the hole when you take it out) once it is un-stuck. Even a loose-fitting hex-wrench would probably turn the pin then.

They can be a SOB, good luck with it.
 

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There's always the cave-man option, use a dremel tool to cut the pin in half, take the caliper apart and using a liberal amount of penetrating oil and an alloy drift knock the pins out from the inside out.........
 
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