Removing a Stud from a rear wheel sprocket???

So I am replacing my sprocket's and chain for my 93 xj600 seca II.

Most of has gone easy for far, then I got to the rear sprocket. The bolts were screwed up due to the chain slipping off, thanks to a broken tensioner, and the chain got caught up in the bolts and seized the rear wheel.... Oh, I was also doing about 20 through a turn and it tossed me like a horse..... luckily I landed back on the bike.

Anywho.

Got 3 of the nuts off the stud's no problem. Also got the stud's out for replacement without an issue using 2 nuts to unscrew the stud.

Got 2 of the studs and bolts out as 1 unit.

The last stud's threads are so toast that the nut will only unscrew about halfway and then it will just freespin as there is no thread to unscrew on.

I have tried all kinds of various techniques to no avail.

I am down to two thoughts unless someone can recommend better.

1.... Propane torch and heat up the area, loosening the locktight on the stud and the area enough to hopefully get a grip on it and back it out with the heat-expansion.

2..... Weld a nut to the stud and use that to back it out if I can get someone with a welder to put a good enough bead to hold, provided the stud isn't made out of magnesium or something crazy.

I'll load some picture's up in a bit if it will help.

The stud's are screwed into the coupling for the rear sprocket to the rear wheel. they are not typical car type stud's that would be pressed in/out.

 

The bolts are steel so you should be able to have a nut welded on (the nut that is there comes to mind). Have your wrench with you so you can pull it while it's still hot, helping with the loctite.

There are also stud extraction tools. I'll bet though that the free spinning nut would interfere with most (all?) of them.

 

Be sure to pull that "coupling" piece OUT of the wheel before any welding so you don't end up wrecking (burning/melting) the damper rubbers it plugs into.

If I were you, I'd pull the hub piece and take it to a machine/fab shop and let them decide what's easiest.

 

There are also nut splitters that will break the nut off. I'm guessing the sprocket is toast too - if so you could just grind the nut away then tackle with vice grips.