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Posted by griz01
 - June 01, 2011, 14:26:04 PM

That is a stud that screws into a blind hole in the cylinder head.Ther are several options to use.
1. If there is any part sticking above the head, cut a slot in it, use an impact driver and hope it comes loose. Impact driver is a must, you need the shock. If that fails;
2. still have some stud sticking up, slip a nut over the stud, a tight of a fit as possible is best, weld nut into place through the hole in the nut, back out stud with a wrench;
3. if no stud stick up or 1 & 2 have failed drill a small hole and some some kind of extractor, I like the newer power extractors over the older styled so called "Easy Outs"
4. as a last resort, drill and retap the head. the steel in the stud is harder than the Alum head, so be very careful not to damage the head

troll- guess you type faster ;D

Posted by Troll
 - June 01, 2011, 14:22:55 PM

They are threaded in. Did you snap it off flush with the head?...Better question might be why did you remove it in the first place. The manual says to remove the muffler, at the prechamber, not the system at the heads. If you snapped it off flush with the surface, that is going to be a problem best left to an expert. If you have some sticking out, you can heat the stud with a propane torch, let it cool a little and unscrew it with perhaps a pair of small vice grips. either way, the head pipes will have to come off. Steel studs into aluminum heads are always a tricky situation.

Posted by lumper
 - June 01, 2011, 13:09:32 PM

Hi all,
I was tightening my exhaust after taking it off to work on the rear wheel and I over tightened and snapped off the front cylinder top nut/bolt.

I dont see anything in my manual about it or whether I can pop it through like a stud on a disc brake on a car, or not.
Anyone know how to replace these?
Do I have to drill it out and use a nut and bolt?
Any help would be great, I would like to fix it before it starts leaking a lot.
Any info would be greatly appreciated, thanks in advance.
Lump

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