When I first got it, I couldn't work out why it would only turn over so far before stopping, somehow for whatever reason someone had put a 1/4 inch socket in through the spark plug hole and left it there. the bore was worse than that before, I cleaned it up a little and hosed it down pretty thoroughly with WD 40.
After that, I put it up the back for a good 8 months or so and now Darryl has it!