Fork Stud Broken!

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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Fork Stud Broken!

Postby RogGillingham » Fri May 17, 2019 12:59 pm

So I finally got the two "yokes" off the bottom of the front forks after a lot of effort but unfortunately one of the studs has broken off and is firmly stuck in one side of one of the yokes. Any suggestions of how I get this fixed gratefully received!!
If no reply - Gone fishing!

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Re: Fork Stud Broken!

Postby Mick D » Fri May 17, 2019 1:57 pm

Hi

Soak the yoke in penetrating fluid overnight, (I use a 50/50 mix of acetone and ATF).

Drill a 3/8" hole in a bit of hard wood or metal.

Heat the yoke with a paint stripping gun or similar.

Using gloves place the yoke in a vice with the 3/8" hole as a clearance on the stud and press the stud through with the vice. Don't worry if it's still tight, just re-lubricate and press it back and forth until it is loose enough to remove.

Regards Mick

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Re: Fork Stud Broken!

Postby cfaber » Sat May 18, 2019 6:04 am

If there's anything to grab onto these work great: https://www.amazon.com/gp/aw/d/B002FCJCVE Don't cheap out on that tool, avoid the China specials for this type of tool.

If no stud is protruding and it's flat you can try a left hand drill, if it's not flat or you don't have a drill press or better, a mill you might consider having your local machinest remove it.

In any case, heat and penetrating oil are your friends in this case.
Fix it until it's broken!

Otherwise how will
anything get done?

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Re: Fork Stud Broken!

Postby john771 » Sat May 18, 2019 9:02 pm

Can anyone tell me what the s means on g80 crankcase


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Re: Fork Stud Broken!

Postby alanengineer » Sat May 18, 2019 9:13 pm

spring frame

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Re: Fork Stud Broken!

Postby alanengineer » Sat May 18, 2019 9:14 pm

whats it got to do with a broken fork stud

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Re: Fork Stud Broken!

Postby alanengineer » Sat May 18, 2019 9:16 pm

sorry, new person. welcome and i hope you find lots of info and many friends here.
if you use' new topic', it helps us old and confused people to help you

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Re: Fork Stud Broken!

Postby john771 » Sat May 18, 2019 9:54 pm

Im old and confused myself just trying to find my way round this site

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Re: Fork Stud Broken!

Postby alanengineer » Sun May 19, 2019 8:34 pm

yes, it a big site with lots to find

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