Snapped CB 500 exhaust stud - What do?

[_mjs_]

Hi all,
I noticed my bike was a bit louder than normal the other day so I checked it out when I got home.
It turned out one of the exhaust pipes was missing a bolt and blowing exhaust fumes out of the head.
I ordered some replacement copper gaskets and when they turned up today I whipped the downpipes off and found the stud had sheared off. Gave it a blast of WD and a quick rive about with some mole grips but it wasn't budging.
Rather than make it worse I reattached me pipes and this seems to have got a good seal, the bike's running great now... but I'm guessing it'd fail an MOT with only three bolts instead of four?
I've ordered replacement studs but I'm wondering if there's a tool of some sort that will get the broken bit of stud out? Thanks in advance for any advice and I'll attach a picture of what I'm dealing with
-Mark
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Previous Bikes: 2006 Honda XR125L > 2003 Yamaha DT125R > 1996 Honda CB500
Current bikes: 1997 Kawasaki ZZR 600 E5 > 2006 Honda Varadero XL125V

[neatbik]

You can get stud extractors -


https://www-1.toolbox.co.uk/draper-58710-10mm-stud-extractor-part-00087936M.jpg

They generally work quite well.
Methods to remove stuck studs - (in no particular order)
Heat, and then mole grips.
File 2 flats on it.
Weld a bar on the to turn it with.
Stud extractors (as shown in above pic)

Finally if nothing else works then cut it off flush and drill it out.

[_mjs_]

Cheers I'll order one of those and a blowtorch Really don't fancy taking a drill to my engine!
____________________
Previous Bikes: 2006 Honda XR125L > 2003 Yamaha DT125R > 1996 Honda CB500
Current bikes: 1997 Kawasaki ZZR 600 E5 > 2006 Honda Varadero XL125V

[neatbik]

They come in a set usually, heres Halfords offerings -
https://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_530659_langId_-1_categoryId_165572

There is another type -
https://lh3.googleusercontent.com/public/40rf0IONtUg3DsmagVWWEeZFmsDa7RXArCU1Gck848mU2z4RZ0-wOb3Czd5NmHiG6u7-y3xCwTlO9SLQlSCdhM_XHCRKCovZgeuxIui3Euw9ak6DMbysNjrrU0kNogpK1Ru_vAdZiSsvQ3wASa7Mvt-FV8CPKhoqwyAC

Which you can buy via here -
https://www.google.co.uk/products/catalog?q=Stud+Extractor&sugexp=chrome,mod%3D8&um=1&ie=UTF-8&tbm=shop&cid=1326364637505547810&sa=X&ei=Tcc_UKKWN8Kj0QWbl4C4AQ&ved=0CGEQ8gIwAw

A fair bit cheaper, but i personally haven't used that type so cant vouch for it, but i suspect others could.

You could also try using a penetrating fluid first (NOT wd40). Plusgas is pretty good.
Soak it for 24 hours, then heat up the stud and try the extractor.

If the worst happens and it snaps off then drill it out.

[stonesie]

That is a nice thing to be left with as broken studs go, plenty of meat left to get something onto.

https://www.screwfix.com/p/irwin-5-piece-bolt-grip-nut-remover-set/96028?cm_mmc=Google-_-Keywordless%20Ads%20|%20Generic-_-HVK%20|%20Keywordless%20Ads%20|%20BMM-_-_cat:home&gclid=COCgxqCWkLICFSPHtAodM1oAlw

Those are my preference, soak it in plus gas as beatnck said, get the bugger HOT and the alloy it's bolted into, get your chosen stud extractor on there and it should come out.

[thomp1983]

with that much access welding a nut on would be the best option, the heat from the welding will free it up

chris

[GREENI3]

The downpipes on my cb look like they're pretty much welded to the engine, theres that much rust.

I'll be investing in a full stainless motad system after winter.
Think I'd rather leave it to the local garage to fit that though.

[_mjs_]

Welding isn't really an option for me, drilling would probably be more viable tbh.
I'll go get some plusgas tomorrow and stick an order in for some stud extractors and a blowtorch.
I'll do an update when the gear arrives, thanks for the replies!
____________________
Previous Bikes: 2006 Honda XR125L > 2003 Yamaha DT125R > 1996 Honda CB500
Current bikes: 1997 Kawasaki ZZR 600 E5 > 2006 Honda Varadero XL125V

[_mjs_]

[Bezzer]

[Rogerborg]

They're not really intended for it, but Irwin bolt grips will also bite on a stud, and are pretty handy to have available.
https://www.toolbuddy.co.uk/ekmps/shops/toolbuddy/images/irwin-bolt-grip-extension-set-a04635-228-p.jpg
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[bikenut]

:karma: hi dude,

how you gettin on, did the stud come out or shear off!!

some pics of progress.......

[neatbik]

[Blue_SV650S]

[Thunderlips]

You lot are great, i have pretty much the same on my CBR600F.

I assume it is a very good idea to remove the petrol tank before i go to town with the blowtorch on the stud , also how long(hot)should i get the stud?

Any advice very appreciated as i am hopeless at this sort of stuff(hence snapped stud to begin with)

Thanks

[temeluchus]