Very nice work, indeed. I would try to get new cluth plates, the old ones look worn out. I'am not sure because I don't know much about the older engines, your cluth plates look very different to the one I had to replace for the model 199b, mine where complete out of steel? You only change the rings as I understand, piston was in such a good status, then you are a lucky man. Looks like You did not even had many scratches on the side covers of the engine, this is good too. Have you done any treatment to the flywheelweight and the clutch case the surfaces of them look so untouched -> no wear marks are visible? Great work, I would like so see more pic's, thank's for posting.