Snowbum says :Resistor discussion: Nearly any type of resistor may be used. It can be the old-fashioned type called 'carbon composition', or any modern type of 'film' or 'deposited carbon' type....or even a 'wire wound' type. The resistor value CAN be 470 ohms, but my tests indicate that 330 ohms is better.
I have the resistor set up and didn't grasp exactly why it was needed...
Until yesterday when i redid the wire and forgot the resitor.
Bike started fine, ran fine. But wouldn't shut off. It was self energizing backwards from the charging circuit.