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Discussion Starter #1
Can anyone tell me what the purpose of the cardboard like material is that is inside the tubular parts of the swingarm? I'm trying to repair a section of the brace that had a hole ground through it during a landscaping expedition. Found the material when starting the repair after cutting the damaged to be replaced section out of the swingarm.
 

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Cant say for sure....I am sure there was some magic frequency they were looking for to keep weld stresses under control.
 
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