I recommend http://www.roadstercycle.com/index.htm Jack's price for a new three phase stator is $99 and his mosfet regulator system cant be beat. I'm running the mosfet system and relocated my regulator underneath the tail, away from all the engine heat. The charging system is more consistent with a charging voltage between 13.8-14.2 no matter the RPM.
Yep, I'm going to eventually go to his regulator, not really any advantage to change to his 3 phase stator.
Just replaced everything, 14v at idle