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.

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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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