The stator is the coil of wire housed inside the engine case. A magnet on a shaft spins within the stator, creating alternating current (AC). That current travels along fairly heavy gauge wire through the case and into the rectifier/regulator which converts it to DC power, and at a consistent output.

Are all stators AC?

Energy use varies from motorcycle to motorcycle and as a result, individual stators may differ. Some stators produce AC power for the ignition system only while others produce AC which is then converted to DC for powering lighting, ignition computers, fuel injection, etc.

How do I know if my stator is AC or DC?

A AC style stator will have the odd ball paper covered pole/s that generate ac ignition power. It includes a ac lighting coil output circuit and a ac ignition power coil circuit. A DC style stator will not have the oddball poles for ignition power.