Snapped exhaust studs and other fun issues

[returning rider]

For anyone having thoughts of dealing with studs, preferably before snapping them, then these simple yet inexpensive tools have got to be worth a go.

https://share.temu.com/ZZ38jDA102A

I tried this type not from Temu but a draper set i got.

Took one out.

Sheared 2 more in place snapped level with the block.

Could not get in on straight or at all to some studs as the timing chain casing and oil pipe and water pip-es all foul access.

My advice to anyone is if your studs are still there cut off the nuts use a dremel to cut a split in them and open the but up, changing the studs is a world of pain I wish I had never tried.

I hear what you're saying, but my guess would be it is not so much the tool itself that was the problem but the studs you were trying to remove.
These bikes are notoriously bad for having poor quality exhaust studs, yhe main problem being 6mm rather than at least 8mm, as I have read many a time on the forum. And the older the bikes get, which currently ranges from 21 to 26 years, then due to the nature of the heat they suffer, you would have to be extremely lucky to not have problems when tackling them.
A few years ago all I wanted to do was change the engine exhaust gaskets. I had a day off work coming up so thought I'd buy a set and it would realistically take me less than an hour to do.
WRONG!!!
The very first nut on the nearside stud I attempted to undo broke like cheese. I barely put any pressure on the ratchet at all, it was like rotten damp wood the way it came apart. So that ruined my day straight away.
And a year ago I had a lot of work done on my bike due to unforeseen circumstances and the mechanic had trouble with them too. I'd actually asked him while the engine was out if he could possibly change all of them for new ones but as he'd already done so much work he didn't want to put anymore hours in to keep the bill down, which was fuly understandable.
As i said that was a few years ago and my bike has hit 24 years old now, so a word of caution to anyone attempting work on the area of these studs is that things are getting old now so don't expect everything to be plain sailing, because there's a strong chance that it it won't.  And if you're not mechanically confident just let a garage sort things out because if anything goes wrong they'll have all the equipment necessary to do a necessary fix, albeit a costly one.

Second this big time be prepared to take the radiator out at very least or front end off to access, but ideally engine out.

As said the studs are very corroded, and will shear before coming on on some no matter how much hear or penetrating spray bi metallic corrosion is extremely powerful.

By hind sight once they were sheared the best option is engine out onto a bench a bench and drilled out.

I made the mistake of taking on a bike with broken studs not realising how big an issue it was. 

Will see if my bodge has worked when I finish all the other jobs and put it back together, coolant definitely needed doing tho was black, have flushed the radiator, once i refit it will flush the engine, change the oil and filter and once i sort the exhaust out see if it fire again. Issue is the downpipes need some attention stainless so cleaned up ok and sound condition but the previous owner and garage had issues with exhaust flanges leaking so they would just keep tightening until they broke the studs. The bolted flanges that pull down onto the spigot are bent they have been pulled in by over tightening the nuts onto the stud. Pain to fix as captive on the downpipes. Also when fitted it does not line up with centre hanger bracket sit too much in the middle of the bike, it was not connected can see why, to pull this will strain the headers at engine side. Need to heat and bend it to pull it back onto shape.

Then just got 
lights 
indicators
forks
rear shock
chain and sprockets
Clean and bleed brakes
repaint the engine and frame 
possibly a front tyre

beginning to wonder if its easier and cost effective to break it and get a better one