do I have to remove engine to get cylinder barrel and piston out?

[Wayne Cole]

The screw is non-standard added by a previous owner to keep the exhaust in, it is normally a push fit.

thanks Duncan, I tried twisting it out carefully but it would budge! I guess I will just have to take off silencer from exhaust and remove cylinder with it attached? should be ok right?

[Andy G]

Or drill for an extractor. Or just drill the whole thing out.

Assuming you've already tried heat, penetrating oil, and some moderate tapping with "Tool, Light Adjusting"

[clive]

The bolt is not really necessary. If the exhaust pipe is loose in the head the correct procedure is to well the end of it out. The recommended way is with a hardwood carrot shaped insert. I have a similar item made of steel and hammer it into the pipe. Before this I got away with inserting a long rod into the pipe and then winding it round and round until it had just welled out the end a bit. So if you have to drill out the bolt it is not really a problem.

[Wayne Cole]

Or drill for an extractor. Or just drill the whole thing out.

Assuming you've already tried heat, penetrating oil, and some moderate tapping with "Tool, Light Adjusting"

heat penetrating oil will be my next step, great advice thanks very much.

[Wayne Cole]

The bolt is not really necessary. If the exhaust pipe is loose in the head the correct procedure is to well the end of it out. The recommended way is with a hardwood carrot shaped insert. I have a similar item made of steel and hammer it into the pipe. Before this I got away with inserting a long rod into the pipe and then winding it round and round until it had just welled out the end a bit. So if you have to drill out the bolt it is not really a problem.

thank you sir!