I know this is an old thread, but it is the closest thing to my problem that I can find. I have a 1976 Hercules moped that hasn’t run since before I got it.
I have the black and yellow wires coming out of the engine. They go to a 3 connector block that connects to 3 wires going to the headlight (1 of these 3 wires connects to taillight) In the headlight I have a headlight and a switch and then a small lever that seems to ground out. I am trying to confirm spark before I go much further down the rabbit hole. I have over 90 psi compression.
Any help on a wiring diagram or other advice would be appreciated.