Posted on October 12, 2012:
Hello Folks!!! I am back at working on the magneto build where I am just about to finish up the magneto body. The next step is to drill out the holes for the points assembly but before I can do that I need to substitute the M3 points spring screw (below left) with a suitable SAE alternative. For that I will be using a 4-40 x 5/8” screw (same as the ones used on the laminations) that is cut down to .400” (below right) to hold the points spring in place on the magneto body.
Now that I know what size screw I will be using for the points spring I can drill and tap the hole needed for the screw.