Swing arm repair

bbtr_736
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bbtr_736
Hey all,
I have a 2005 cr. Unfortunately one of the threads for the adjusters if completed stuffed. Can these be re welded and tapped. if not is there a way to repair them.

Cheers fellas,
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Layton
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Layton 5/5/2019 3:41pm
5/5/2019 3:41pm
Helicoil is one way to fix it.
1
soggy
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soggy 5/5/2019 4:22pm
5/5/2019 4:22pm Edited Date/Time 5/5/2019 4:24pm
i have the same deal on my kx swingarm. i talked to one welding shop but he wasn't interested in doing 1,because it was aluminum and two because he doesn't work on many/any bikes. i might try talking to another shop though. I would have them plug the hole then i could redrill/tap.

there are also swingarm saver kits out there for bikes like yours and mine but they aren't great in my experience.
bbtr_736
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bbtr_736 5/5/2019 4:34pm
5/5/2019 4:34pm
Layton wrote:
Helicoil is one way to fix it.
Only issue one side the thread has actually broken away.
bbtr_736
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bbtr_736 5/5/2019 4:36pm
5/5/2019 4:36pm
soggy wrote:
i have the same deal on my kx swingarm. i talked to one welding shop but he wasn't interested in doing 1,because it was aluminum and...
i have the same deal on my kx swingarm. i talked to one welding shop but he wasn't interested in doing 1,because it was aluminum and two because he doesn't work on many/any bikes. i might try talking to another shop though. I would have them plug the hole then i could redrill/tap.

there are also swingarm saver kits out there for bikes like yours and mine but they aren't great in my experience.
Yeah I have seen a few but would like to repair to standard. Could you let me know how you go?

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Layton
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Layton 5/5/2019 4:56pm
5/5/2019 4:56pm
A helicoil would make it back to the original bolt and thread size.
https://youtu.be/sQHRB2ElZJ0

If the adjuster is broken off it can be drilled out.
bbtr_736
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bbtr_736 5/5/2019 5:25pm
5/5/2019 5:25pm
Layton wrote:
A helicoil would make it back to the original bolt and thread size.
https://youtu.be/sQHRB2ElZJ0

If the adjuster is broken off it can be drilled out.
Adjuster is out but the actual thread is broken off. it isn't solid alloy inside the swing arm? So i don't believe part of it there is not alloy to drill out.
kb228
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kb228 5/5/2019 5:29pm
5/5/2019 5:29pm
You can weld it and re-drill & tap. Because its a somewhat thin wall, having a thread insert go in and actually stay theyre doesnt sound promising to me.
Layton
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Layton 5/5/2019 6:27pm
5/5/2019 6:27pm
How thick is this?

The factory must have thought it thick enough to tap for the adjustment bolt to go into.
BAMX
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BAMX 5/5/2019 8:23pm
5/5/2019 8:23pm
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bbtr_736
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bbtr_736 5/5/2019 9:51pm
5/5/2019 9:51pm
Does anyone know how much alloy is actually in side the swing arm to work with.
kb228
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kb228 5/6/2019 6:07am
5/6/2019 6:07am
bbtr_736 wrote:
Does anyone know how much alloy is actually in side the swing arm to work with.
1/4-3/8” or so
Layton
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Layton 5/6/2019 6:08am
5/6/2019 6:08am
Then there is plenty for the insert to hold on to.
soggy
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soggy 5/6/2019 6:43am
5/6/2019 6:43am
soggy wrote:
i have the same deal on my kx swingarm. i talked to one welding shop but he wasn't interested in doing 1,because it was aluminum and...
i have the same deal on my kx swingarm. i talked to one welding shop but he wasn't interested in doing 1,because it was aluminum and two because he doesn't work on many/any bikes. i might try talking to another shop though. I would have them plug the hole then i could redrill/tap.

there are also swingarm saver kits out there for bikes like yours and mine but they aren't great in my experience.
bbtr_736 wrote:
Yeah I have seen a few but would like to repair to standard. Could you let me know how you go?
im not in a rush cause i have another arm, but if i do i will post. mine is beyond the point of being able to use a helicoil so my only option is weld/drill/tap
zb658
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zb658 5/6/2019 6:58am
5/6/2019 6:58am





I machined an aluminum insert, drilled it and tapped it, then welded the insert into the swing arm. We drilled out original holes to be bigger but replaced that with the more material, longer recessed, threaded insert.

Dont be a dummy with the next ones whenever you do fix it though. Lol antiseize the shit out of them frequently.

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