Hi I orderd this one 1021 Wiring loom, alternator (tail light loom is not included) M 1956-62 from dragonfly with out noticing the alternator part. The wiring diagram has M20 on ( see pic ) Mine is a magdyno so is this the correct one.
Was the M20/21 ever produced with an alternator?
I think it was. For the AA. They needed the extra power for their radio equipment.
Ah. That would make sense.
So the wrong one for mine :-[
That wiring diagram looks like a straight forward magdyno one, I don't see anything about an alternator on the diagram, just the comment "not AA models"
The wiring for the AA jobs with magdyno and alternator are much more complicated with extra wiring for the alternator, rectifier and coil switching for the alternator.
Just had it laid out one the bike and looks to be correct :) No extra wires .