1935 16H magdyno points

I've no experience with pre-war, but some of the info in the following link may help - I haven't read it all, but if it's correct, "MO1-4 AG4" would be correct for a Norton, and "542" would probably indicate May, 1942

http://pub37.bravenet.com/forum/static/show.php?usernum=3155626639&frmid=16&msgid=1372430&cmd=show

The brightsparksmagnetos site also has a lot of detailed Lucas info.

http://www.brightsparkmagnetos.com/library/Parts%20lists/Lucas%20motor%20cycle%20parts%201936-57/G24-40%20Magdynos.pdf

Alan

For 1935, the original fitment was the ring-cam MS1 AG1 (with of course a third brush dynamo mounted above it).  The face-cam MO1 was introduced for 1937. It sounds as if you have a WD16H magdyno which is a 100 % substitution.

The only practical disadvantage is that the deeper points cover required a larger cutaway on the top edge of the primary chaincase which may not be present on yours...even then, the points have to be correctly aligned in order to remove the cover easily.

Originally, with a clockwise mag, yours had the A/R cable next to the cylinder giving tight wire advance. You can build it as you prefer - you'll need the correct cam plate for the side that you choose.

Richard...that's finally explained why my mag cover is so hard to remove! I now need to check if I can just shorten the cover.