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 Post subject: Striipped Thread
PostPosted: 12 Jul 2009 23:57 
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Was replacing belt on my XB12R and managed to strip thread/helicoil from one the holes that recieves the bolt securing the swing arm brace. Not 100% sure if its's a helicoil, I've been told it will be magnetic if it's Helicoil as opposed to just the metal of the swingarm. It's not Magnetic, what made me think it was a Helicoil was when I removed the bolt after feeling it strip it wound out a perfect coil of metal with it.

There's still an amount of thread there, I can screw the bolt in, just haven't tried to tighten it up.

Whats the best course of action for this?

The other three bolts went in fine and torqued up without a problem.


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 Post subject: Re: Striipped Thread
PostPosted: 13 Jul 2009 00:15 
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Milf Hunter
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Helicoils that I've fitted have always been stainless steel (non magnetic). The perfect coil that came out with the bolt was more likely to be the remaining thread.
What you can probably feel, is the remaining thread at the bottom of the hole. If you try to tighten it up, you will only strip the rest anyway. I would suggest that you need to get it repaired.

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 Post subject: Re: Striipped Thread
PostPosted: 13 Jul 2009 08:35 
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Thanks Mojo

Would a repair just be a helicoil, had a look how these work doesn't look to difficult to do. Only problem I have is I'm not sure what size the bolt is hence what size kit to get and once it's done does the torque setting change.


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 Post subject: Re: Striipped Thread
PostPosted: 13 Jul 2009 10:28 
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Site Admin
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Threads are 5/16'' unc and IMO the shop manual torque of 26ftlb is too high, I torque them to 20ftlb.

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 Post subject: Re: Striipped Thread
PostPosted: 13 Jul 2009 12:35 
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Adam wrote:
It's essential that the drilling and tapping is done perfectly and with hand held tools ie, not in a jig, it's not always that easy to get it 'square'.

This one intrigues me. Would a jig not be more likely to get it true than doing it by eye?

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 Post subject: Re: Striipped Thread
PostPosted: 13 Jul 2009 12:38 
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Adam wrote:
CM, if there's enough meat around the hole then a Helicoil will be perfect - and stronger than the original fitting. If you've not done one before, I suggest you take it to an engineering firm or a GOOD bike shop. It's essential that the drilling and tapping is done perfectly and if using hand held tools ie, not in a jig, it's not always that easy to get it 'square'. It's a quick and cheap repair though.

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 Post subject: Re: Striipped Thread
PostPosted: 13 Jul 2009 12:41 
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Norm wrote:
Adam wrote:
It's essential that the drilling and tapping is done perfectly and with hand held tools ie, not in a jig, it's not always that easy to get it 'square'.

This one intrigues me. Would a jig not be more likely to get it true than doing it by eye?


Well spotted Norm, 'twas a typo fek up :D You'll have to excuse my ramblings, as the painkillers I took for breakfast are just kicking in ;) :lol: :lol:

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 Post subject: Re: Striipped Thread
PostPosted: 13 Jul 2009 12:53 
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Adam wrote:
Well spotted Norm, 'twas a typo fek up :D You'll have to excuse my ramblings, as the painkillers I took for breakfast are just kicking in ;) :lol: :lol:

:hehe: :hehe:

You'll get an instant ban from the Tech Forum, making a mistake that I can pick up. :lol:

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 Post subject: Re: Striipped Thread
PostPosted: 14 Jul 2009 09:49 
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Thanks for advice chaps, getting it sorted now.


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 Post subject: Re: Striipped Thread
PostPosted: 14 Jul 2009 16:55 
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The Nagged Hubby
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Taint a rocket ship by eye will be fine.

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