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I know this isn't IT.. Just trying to get a screw out, anyone seen this before?

AB_IT

By AB_IT
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AB_IT

AB_IT

Posted
Posted

Hey All,

 

I've put this on numerous forums, asked the old man and other friends and yet no one seems to know what the hell bit I need to undo this screw. I have two of them on my Motorbike Variator Casing.

 

If any of you know what to do I'd really appreciate it :)

 

IMG_3744.jpg

AB_IT

AB_IT

Posted
  • Author
Posted
Looks like a nut that has lost part of its side.

It's almost in the shape of a childs drawing of a house lol!

I've checked the screw but it hasn't got any damage and there's two of them the exact same so it must be on purpose.

 

It isn't a screw on the other side is it?

 

No it just goes into a thread in the casing, nothing the other side.

mikeprice

mikeprice

Posted
Posted
It isn't a screw on the other side is it?

 

Could be a weird shape so that it gets captured when the screw on the other side tightens up

 

if not I would suggest using a very small socket after giving it a good clean up to make the sides and angles as sharp as possible

dmj

dmj

Posted
Posted

I't looks like it needs a specialist tool. You'll probably need to make something to remove them. Find a bolt that nearly fits and cut it down to size then weld an old socket to it. I've got a couple of tools I've had to make up for things like this - it's not uncommon on bikes.

 

PXL_20220630_153608711.jpg

AB_IT

AB_IT

Posted
  • Author
Posted (edited)
Could be a weird shape so that it gets captured when the screw on the other side tightens up

if not I would suggest using a very small socket after giving it a good clean up to make the sides and angles as sharp as possible

 

Nothing on the other side, literally just screws into a thread. So weird!

 

What do you mean regarding the socket? The outside of the screw is just circular so nothing for the socket to grip onto.

 

I't looks like it needs a specialist tool. You'll probably need to make something to remove them. Find a bolt that nearly fits and cut it down to size then weld an old socket to it. I've got a couple of tools I've had to make up for things like this - it's not uncommon on bikes.

Well that'll knacker me up, I don't know how to weld!! :(

Edited by AB_IT
dmj

dmj

Posted
Posted

Well that'll knacker me up, I don't know how to weld!! :(

 

If you can find a suitable bolt, perhaps you could put a couple of nuts on it and lock them together.

LeMarchand

LeMarchand

Posted
Posted

The picture looks like you could use a pair of pliers to turn the rectangular bit with.

 

OTH "motorbike variator casing tool" turns up a few likely looking tools on eBay and Amazon.

AB_IT

AB_IT

Posted
  • Author
Posted
If you can find a suitable bolt, perhaps you could put a couple of nuts on it and lock them together.

 

What do you mean? I have plenty of bolts lying about?

The picture looks like you could use a pair of pliers to turn the rectangular bit with.

OTH "motorbike variator casing tool" turns up a few likely looking tools on eBay and Amazon.

 

Looked at all those, they're not the things I'm looking for. It's literally like a screw bit.

dmj

dmj

Posted
Posted
What do you mean? I have plenty of bolts lying about?

 

 

So if you can find a bolt that almost fits, can you cut it down with a hacksaw/grinder so that the head fits in the hole, then lock two nuts together on the thread and use a spanner on one of them to undo the weird shaped bolt in the casing?

Chris_Cook

Chris_Cook

Posted
Posted

Is it like an allen head bolt, but with a bit missing? Or is it a normal bolt head? Maybe find an allen key the right size and grind/file one of the corners off. That, or maybe hammer an old Torx bit in if you can get one just a bit larger.

 

The other option is to look up the service manual for the bike. These often give you a part number for the tool you need. But I bet the official tool is not cheap.

 

If there is enough to grip onto, you could try getting some Knippex Cobra grips/pliers. These are really good at gripping/biting onto bolts, but I suspect this is probably stuck in quite well.

 

Last and most destructive option is to drill it out. if you can center-punch the middle of the bolt, then drill using progressively larger bits until just the thread is there. Or drill the head off, get the casing off and hope there is enough bolt left to get some grips on it. If you drill it out, then you need to get it very straight in order to not damage things. You can also get left handed drill bits that will help un-screw bolts if the bit snatches and binds up. Great for rounded off bolts.

AB_IT

AB_IT

Posted
  • Author
Posted

Thanks everyone :) I've tried a few things on this thread but to no avail. I may need to drill the thing out. I don't have the manual and can't find it online so I'm knackered there.

 

The sky has now gone a lovely shade of grey though so I've ran back inside. The left handed drill bit sounds like a plan too!

AB_IT

AB_IT

Posted
  • Author
Posted
I got it in the end all thank you for your help. Took about 30 minutes of sanding an allen key and a bit of a hammer to make it fit and it's fine. :)
  • Thanks 1

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