Hi all,
Thanks all - some great info there.
I’m now the proud owner of a brand new 8:1 piston (shiny shiny!) and have had an enjoyable if mucky weekend cleaning up all the valve gear
Cylinder has honed up nicely - it had been attacked by corrosion following a thirty year stint under various workbenches, but a drill powered hone has brought it back to serviceability if not perfection
Now my attention has turned to the mating face of barrel to head, and there’s something definitely not right here. Cheapskate alternative to engineers blue reveals that the larger mating face (muff to head) is making contact before the sealing face (liner to head). I’m pretty sure this is wrong, and read somewhere (probably on here) about using coarse grinding paste on the muff and fine grinding paste on the liner top to get the appropriate clearances. Ho hum, off to do some more reading before I attack this in earnest. Is this a common occurrence? The barrel and head are a pair from the bike - ie not mix and match from various sources
J