The timing slot in the flywheel is at full advance (I thought it was 34 degrees Allan).
Your right Mark for 68... Early A65's and A50 cyclones used 37 degrees BTDC timing, the timing tool came in c1965 and had a marking both sides to highlight which direction the tool should be (some aftermarket tools dont have these stampings)
By about 66/67 all timing called for 34 degrees, the factory probably felt this suited the bikes rolling out of the factory as proven by the numbers on the dyno. It was also about 66 that they started using larger port heads (might have something to do with the port change or could just be coincidence) it was about 67 that the strobe timing inspection window apeared on the primary cover.
I beleive early rotors which wouldn't have had the timing marks were narrower than the later one so it would be interesting to see what you have.
71 WSM gives 34- 36 degrees BTDC as ignition timing.
I've seen this... God knows why the change...
Thanks Mark, of course this rotor that the builder used has NO marks on it. so I will have to make a line to coincide with the pointer. speaking of pointers I have to have the pointer in the right side hole in the case, correct. my case has 2 holes for the pointer
As your not using a rotor with marks already showing, it wouldn't matter which hole you picked, as long as your line came inline with one pin...
The best way would be to mark with a ruller across the stator and rotor that way you know that when you have made your mark, you know the refrence for it is correct when strobe timing.