I too have now moved into the world of magnetos and would appreciate your advice. First a picture of why I took it all the way down.
I now understand why my tach quit working. First question, is there a trick in taking the bad shaft loose from the rotor? Is it just stuck on? I don't see any type of set screw. My second question, is there a trick in removing the pin from the rotor drive gear? I wound up basically grinding it down with a Dremel to slide the gear off, I could not get the pin to budge any other way.
Finally since I am this far into it what other parts would you replace?
Thanks
JerryR