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PostPosted: Mon Jan 14, 2013 4:53 pm 
Dirt Disciple
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Joined: Sat Dec 22, 2012 7:49 pm
Posts: 71
Location: London UK
Some scumbag had my front mudguard away the other day, and must have been halfway through relieving me of the rear, as the nut was gone and it was just hanging on the bolt (how the hell did they know it was the owner returning?). In the process they seem to have screwed the thread on the fork such that it wont take a bolt anymore. I thought about drilling through the hole but the front of the fork brace is curved and it would really spoil the look. I don't want a crud catcher as that really would look crap with my frame. Is there some sort of socket i could insert by redrilling the knackered hole.. inserting socket whicch would then take a bolt?


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PostPosted: Mon Jan 14, 2013 4:58 pm 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
Is there enough metal to allow you to drill a hole and then tap the next thread size up?


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PostPosted: Mon Jan 14, 2013 5:06 pm 
Dirt Disciple
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Joined: Sat Dec 22, 2012 7:49 pm
Posts: 71
Location: London UK
There is but i wouldn't be confident of doing a good job rethreading it.. been looking at anchor bolts and such.. seems to be lots of hardware that would do something like this, not exactly sure what i'm looking for though. I've got abt 15 depth to play with, old hole was prob 4mmØ..


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PostPosted: Mon Jan 14, 2013 6:21 pm 
Retro Guru
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Joined: Tue Aug 07, 2007 12:22 pm
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Location: Platsa, Messinias, Greece
Can't you just run a tap through it to clean the threads up? Unless the thread is completely stripped I'd have thought that you'd get away with doing this.
Or just drill it out clearance and use a longer bolt with a nut on the back?


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PostPosted: Mon Jan 14, 2013 6:31 pm 
Dirt Disciple
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Joined: Sat Dec 22, 2012 7:49 pm
Posts: 71
Location: London UK
Hi, as i say i did think about drilling completely through but am reluctant on aesthetic grounds. The thread doesn't look completely sheared so maybe your tap idea would work? What would i be looking for to do this? I think the bolt is 4mm.. i'm pretty cluelesss about ironmongery and fixings. Would i need a specific pitch or are they all standard for bolts?


EDIT: remembered i had a small old tap set, turns out that the thread is truly w@nked. The old bolt now almost slides in and out.


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PostPosted: Mon Jan 14, 2013 7:25 pm 
Gold Trader / rb Rider / Special
Gold Trader / rb Rider / Special
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Joined: Mon Aug 31, 2009 12:26 am
Posts: 16165
Location: Rurally close.
Nut and bolt, bigger bolt or helicoil.


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PostPosted: Mon Jan 14, 2013 7:56 pm 
Gold Trader
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Joined: Sat Oct 23, 2010 10:33 pm
Posts: 2119
Location: New Forest
Tap it for the next size up.


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PostPosted: Mon Jan 14, 2013 10:53 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8209
Location: New Forest, UK
You could always put a nut on the other side, or drill and tap it to take an M6 bolt, which is a common touring modification anyway.


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PostPosted: Tue Jan 15, 2013 12:11 am 
retrobike rider
retrobike rider
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Joined: Tue Jan 29, 2008 11:04 pm
Posts: 1800
Location: A wretched hive of scum and villainy...
I can helicoil it for you.
I'd drill out old thread oversize, tap out with special tap, fit new spring thread back to the original size, probably M5 x0.8.
Happy to do it for the karma, just cover the postage.
PM if interested.

All the best,


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PostPosted: Tue Jan 15, 2013 10:34 am 
Dirt Disciple
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Joined: Sat Dec 22, 2012 7:49 pm
Posts: 71
Location: London UK
Danson67, that is a very generous offer thank you. I've watched a few utube video's on tapping though and think i should be able to drill and tap it larger. As the original hole was really too small anyway a larger bore would be no bad thing. Thanks everyone for the advise :)


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