I was working on my new old bike this evening, trying to sort out a hard start issue, when I discovered that at even at maximum retard on the ignition plate, the timing was still at full advance at idle.
I used a Dremel to elongate the holes in the ignition plate, and was able to get the idle timing set to the "S" mark.
Now the bike starts easily, and pulls like a tractor.
My question is, is this a common problem? I have no idea what brand of points/condenser was put on this bike by the PO, so are there aftermarket points that will cause this condition? If I put in a set of genuine BMW points, will I be able to set the plate back to a more "normal" position?