Magneto is with AC or DC ignition,DC ignition is with two groups of coils, one group is a charge coil, the other isthe trigger coil. AC ignition is with three groups of coils, one charge coil, one ignition charge coil and the trigger coil.

Charging coil provides power for the vehicle, an ignition charge coil providespower for the ignition, trigger coilprovides pulse igniter.

Magneto is a motorcycle generator, there is magnet on magnetic rotor, it is not one but several parts,rotate withcrankshaft, the stator coil cutting magnetic line of force will be generated with the generator current, its principle is exactly the similar as a generator. The rotor magnet is polar, but which side is the N pole, which side is the S pole is not important, as long as the change in the order of their corresponding line installed in the rotor in line.