... Have you learned any technique to use to get good visibility through the timing hole (that may be my problem)? It's difficult to get a clear view of the timing marks because the carb and fuel line restricts my angle of vision...
Grab a Q-tip, or similar, and add a dab of white paint on the timing mark.
On my bikes, I spritz a bit a carb cleaner on a rag and use that to clean off any oily film on the flywheel perimeter. Then the white paint onto the letters and marks as on later mods of R-bikes. Not to worry about painting "outside the lines" as the same carb cleaner rag can be used to lightly wipe off any over-paint and the desired paint stays in the low spots.
On a tip from Justin, I now do this painting with the engine OFF. [smiley=mad.gif]
Monte