Ah yes!! Location would help! I'm in North Wales on Anglesey! The bike is a 1983 model which has been sat in my shed for about 18 months now, and I'm finally getting around to doing something with it! The engine was in a bit of a state as the small end bearing had fallen apart and has damaged the crank cases aswell as the barrel etc... I have managed to get another engine which requires building but I need to get the barrel rebored! I suspect that it has never been done as there is no numbers on the crown of the piston.
I'm not that bothered if its not local, just not sure on where to look?
Thanks again, John