If the regulator plug rattles loose just enough to cause it to ground out it will cause you to have a bad regulator and
stator.
from DRBarnhart
http://www.bigdogbiker.com/forums/ignition-electronics-batteries/51566-stator.html
Testing the
Stator.
Let me preface this be saying you need to be extremely careful when performing the AC voltage check. It should not kill you but it is sure to scare the shit out of you of you let the probes touch each other or ground and will probably damage your meter and probes. Perform this test before the beer.
To test the
stator start with a resistance test.
1. Remove the VR
plug from the
stator.
2. Measure the resistance across both pins of the
stator plug. The resistance should be 0.5ohms or less, usually it is zero on most meters. Do not forget to subtract the resistance of your meter leads. If it is an open circuit the
stator windings are damaged and the
stator needs to be replaced.
3. Measure resistance from Pin 1 (either Pin) to ground and then from Pin 2 to ground. It should be an open circuit in both cases. If it is not then that means the windings are shorted to ground and the
stator is bad, the
plug may be damage or the rotor has interfered with the wires. Remove outer primary and rotor to inspect
stator.
4. If
stator passes resistance check you can check the output voltage. Again BE CAREFUL!! remove the vR/Stator
plug. Start the bike, measure AC voltage across the to
stator pins. At idle you will have around 15-20VAC, the voltage will increase as the RPM is increased. The voltage can go up to about 60VAC or more at high RPM. Have a buddy help you run the throttle, keep you eyes on the probes and do not let them touch each other or ground. If you see voltage as indicated below the
stator is functioning.
Dennis