Having got the bike up and running, and relatively oil tight, during the course of attending to primary chain alignment I noticed that there is a fairly significant amount of end play on the crankshaft. I seem to recall reading somewhere that there should only be a few thou movement, and mine is in excess of that. I don't intend to pull it apart as I want to ride it, and as I've mentioned before, the previous owner had done a lot of work on this bike - the piston heads are squeaky clean etc., and I can't imagine him putting it together without addressing this aspect of the engine, so rightly or wrongly I'm going to assume it's ok. Unless, of course, the collective thinks otherwise!