I'm very impressed, Sir Chook. You have given so much detail, so clearly expressed, that if my memory were a bit better I'd be able to date the 12" I once had fairly precisely. Because it had the long tubular exhaust and solid aluminium handles it was clearly made prior to 1951. It had a small diameter solid steel clutch, but my recollection is it was much shorter than McDougal's small diameter clutch. The catcher was aluminium. It all hangs together except that I've always been rather sure the kickstart was solid steel, which would make it 1947, but I can't recall that with complete certainty. There is one other detail you haven't clarified for me. My crankshaft and flywheel lacked keyways, so timing was a rather awkward process, especially if you didn't know what the breaker gap should be (I didn't). I'm told that all of those two strokes that everyone else remembers, had keyways. Is there a date when the keyway was added?
