HUB,what is your take on what yer seeing here...Have you seen this before?Thanks

BTW,it's not on my bike.Someone elses.That's a hub cinch bolt(there's two) used for loosening the chain adjuster on a single sided swingarm.They tighten down the swingarm onto the hub after adjusting.

* Last updated by: Grn14 on 8/8/2021 @ 10:36 PM *

The threads are torn out of the hole. Swing's threaded V's are locked in the bolt threads, then the more you tighten, the thread walls are pulled out off the thread hole. Those look like the axle was not loosened first, then trying to walk the axle back, it really walked the threads out.

Heli coil probably will fix it. The adjusters move the axle back, you step on the chain to bring the axle forward, tighten the axle, then snug the hex bolt up to about 7-8ftlbs on that 8mm bolt. Yeah, 7-8tq is for a 6mm bolt, but we are talking just snugging the adjust bolts. I mean it's a light snug, short of the bolt backing out, then snug the nut if used for the bolt adjuster.

On a single sided swing arm those bolts just pinch the hub. Hub rotates to tension the chain He may have to remove
the wheel to fix it but a helicoil or keensert should do it.

Mad

Thanks all.I guess he'll figure out the best way to go with this.IDK if it's both bolts or not.

So let me ask then..does it look like it was overtightened?Or possibly either(or both)bolts were not tightened correctly as in 'back and forth' sequential tightening?Like maybe he tightened one down and then did the other?(which would not be the correct way on this bike).

I ask because mine(same model)has these and I don't want this happening to mine.I do follow the procedure for this.He said he did,but I have my doubts.Had mine loosened/tightened several times for chain adjustments and haven't had any problems so far.The H2 has these hub bolts as well.Never a problem with that bike either.

* Last updated by: Grn14 on 8/9/2021 @ 3:18 PM *

"Those look like the axle was not loosened first, then trying to walk the axle back, it really walked the threads out".

This bike doesn't adjust the axle in that way.It's got an eccentric chain adjuster you use a hook wrench on.You loosen these two bolts first,then adjust the ring(chain)and retighten the bolts.No way you could force the adjuster with those tightened down.
Looks like he tightened one down fairly tight then did the other one.That would cant the hole for this one just enough to not thread correctly(IMO)Is that possible?I've experienced this kind of situation on some other small fittings on my bike,but it didn't damage anything because I corrected it before it got to(maybe)this point.

Let me ask another question then.If one was to tighten down wheel nuts in a plain circular pattern,why would this be bad?Just curious that's all.I don't do it this way of course.But maybe the two patterns of tightening have a similar result as this bolt does?IDK.Thanks guys.Appreciate the time to learn me somethin

One more question..is this outcome of these (this)bolt the result of tightening one down first,and then the other?Is this the reason for the manual procedure?I'm suspecting it is.Kinda similar to the front pinch bolt procedure.

This amount of damaged threads looks to me like the thickness of the forward part of the swingarm there,where the bolts tighten into that part of the threads.Otherwise,I would think the whole thread run would be damaged.The undamaged part is just the aft side of the fastener hole,no threads in that.

* Last updated by: Grn14 on 8/9/2021 @ 3:44 PM *

A longer bolt that goes thru the hole and ny-lock it with that style nut.
I think you don't have to move anything so the heli should work with lots of room.

Look at the threads at the nose. Those few threads are not cross-threaded so it was just loosened and never removed is the guess. It was just pulled too tight and what failed were the aluminum threads up against the stronger steel threads.

The minimum is 5-6 threads for it to stay tight and not unwind. And no, the swap back and forth is not a thread puller kind of adder. It was simply over torqued. That was gorilla pounds, not foot/inch pounds. It's the old, here hold my beer, watch me tear the threads out of this hole.