Cylinder removal.

I can't remove the cylinder from my '78 250 OR. I'm guessing that the gasket has become like an adhesive. Would brake cleaner or acetone dissolve it?

If the cylinder hasn't been off for a while chances are its rusted to the studs,break out the rubber mallet and proceed with caution on the fins.

Also be real carefull not to crack the bottom of the sleeve if you crack one of the thin bridges you can just cut them off mine cracked further up and I had to replace the sleeve good luck

I concurr with the stud holes being full of crud and rust. I'd just pulled mine and had some level of debris in them.

There can be a ton of dirt around those studs, and it's all gonna fall into the crank when you lift that cylinder. Then you've got the ugly job of flushing it out. Sounds crazy, but I just turn the whole bike upside down before I remove a cylinder.