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I crashed last weekend and my rear set flexed enough to put a dent in my swing arm. Wondering if this is still safe to ride or should I replace it?
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I put my bike on a rear stand, start it, put it in first gear, then use a "borrowed" pill bottle to dribble-stream some 10w-30 on the inside loop of the chain. OEM cogs, chain have more that 65k on them.

The rusty chain issue aside, I doubt that dent compromises the structural integrity of that swing arm at all. Just periodically check for cracking.

I'm not an expert though. Probably wouldn't hurt to have a bike shop do a once-over though. Make sure that your critical fasteners are torqued, triple-tree is trued-up and such.

 

YZFR6... ooodles of HP
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If it doesn't crack, probably fine.
 

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Hard to tell in the pic, but ya if its punctured or cracked then I would replace or repair the swingarm. If theres a tear you can just have a metal fabricator or any good tig welder. Open up the crack and weld, then you can use a flap sand wheel on an angle grinder, smooth it all out, and use body filler on top, sand, prime and paint it with glass black.
 

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Looks like it's out of reach of your rearsets. Also looks like Bondo residue and a non-factory paint job. I assume that you bought he bike used... Rather than denting in the crash, you might have popped out the Bondo from a prior repair.
 

UR B-hind Da 8 Ball
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Looks like it's out of reach of your rearsets. Also looks like Bondo residue and a non-factory paint job. I assume that you bought he bike used... Rather than denting in the crash, you might have popped out the Bondo from a prior repair.
Ding ding ding! We have a winner!馃槂

That dent was already there before your accident.
 

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I just assumed that he had already replaced his rearset (with a smaller/different one) before taking the photo. But I'm not sure how a bondo-prepped surface is supposed to look.
 

UR B-hind Da 8 Ball
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I just assumed that he had already replaced his rearset (with a smaller/different one) before taking the photo. But I'm not sure how a bondo-prepped surface is supposed to look.
The Bondo is still in the pics around the perimeter of the dent under the paint.
 

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Funny how I didnt spot that, now that you guys mentioned it the paint on the swingarm looks to shiny. Its been resprayed
 
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