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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Front Fork clamp bolt sheared !!!
Post Info TOPIC: Front Fork clamp bolt sheared !!!
The Drifter


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Front Fork clamp bolt sheared !!!
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can anyone help i changed my front  tyre on my ttr 250 and i have over tightened one of the axle  holder bolts [10mm] which caused it to shear [im gutted] and i think they are welded to the fork as anyone got any suggestions on my options without great expense. 



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TTRfan


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Don't panic Wil - they are only studs and I have sheared a few myself over the years disbelief

If there isn't enough of the sheared bolt protruding to get the Mole grips on then drilling and extracting with the proper tool such as an "easy out" will be needed. 

Brian



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The Drifter


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Brian sorry but i am only a novice at mechanics so please be patient ??? so are you saying if i can get mole grips round it , it will then screw out or do i have to pull it ?? next question do you have any replacements.



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TTRfan


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The broken section should screw out if you can get a grip of it. Normal RH thread.

I think I have a few spares that aren't exactly the same as the originals. Will have a look in the morning and get back to you.

Brian



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TTRfan


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I can't find my spare studs so guess I used them all - sorry!

I took a stud out of another fork to show you what it looks like whole. The short threaded section goes into the fork. They usually come out quite easily. See the pic below.

It is odd that Yamaha don't show the stud separately on the fork fiche. It would be daft to have to buy a new fork leg just to get over having a broken stud no

They are 35mm long and take an M6 nut. Nearest I could find on eBay is here

Hope that helps?

Brian

Axle holder stud.jpg



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The Drifter


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Thanks Brian i will have ago sunday when i have the time to do it.



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TTRfan


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I had used all my studs but I had a go at tidying up my workbench today (what a state! disbelief ) and found a new packet of them. They are a close enough match (see below) and you are welcome to one if you aren't fixed up now?

Brian

Front axle 6mm studs.jpg



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petenz


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yer really can't beat the old nut & bolt sometimes...

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AussieChookchaser


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One of these sheared off when changing the front tyre. I am just wondering if this size will be okay. It is all I can find in Australia.

Uxcell 10Pcs M6x30mm 304 Stainless Steel Double End Threaded Stud Screw

www.harfington.com/en-au/products/p-1491695

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AussieChookchaser


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Anyone, Will 30mm be okay or not?? I am assuming it will be okay, but I am no expert.

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mossproof


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You might find 30mm slightly too short. You need about 25mm to be protruding from the surface, so if the stud screws in 10 mm, you need a 35mm overall length. If in doubt, get a 40,, stud and cut down the excess thread.

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AussieChookchaser


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Thanks for that I just needed another opinion on it to make sure. They are a bit hard to find here in Australia. I will see what I can dig up. Thanks for the advice

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mossproof


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You could just as easily use a long M6 set screw (bolt that is threaded all the way) Screw it in lightly with some thread lock on and cut the head off at the appropriate length. There's not much science to it except for the unthreaded bit of the stud tightens it up before the it bottoms out in the hole.

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AussieChookchaser


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Thanks for the advice, I found some 35mm on Ebay, from China, Didn't really want chinese, but nothing locally
www.ebay.com.au/itm/275821595476

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