Thanks, that helps a lot. Think I can get hold of a new piston and rings fairly easy but the gasket was illuding me so good to know I can use a powertorque one.
Took the piston off as picture and gave it a bit of a clean but presume that this is too far gone?
Bit confused what the shim is and why it's there, was underneath one of the rings. Is this normal?
Problem seems to have been at least partially caused by coking round the exhaust port.
Now looking at honing tools, and excuse to buy new tools. What kind of grit do you use and presume it just needs a light going over to avoid oversizing it.
Also, what size are the engine nuts? Might as well take the engine off the body, will be easier and can give it a good clean.
Made some progress today, cleaned up head and cylinder ready to reassemble.
An impact gun would have been nice but working with limited set of tools although this has now expanded to some long angled needle nose pliers!
