Motorcycle Questions? Ask a Mechanic.
Yes. You'll want to unplug the regulator from the stator and test the stator. With the meter set to AC volts you should see about 20 volts at idle and watch it ramp up with an increase in engine RPM's. It will be somewhere in the mid to upper 40's at about 3000 RPM.
You'll then set your meter to the OHMs setting. Test each stator lead from the lead to a ground. You should not have continuity to ground. You will see no change in the meter or an infinity reading (the same reading you see by touching your two meter probes togehter). Any resistance to ground means that portion of the stator is shorted and the stator will need replaced.
If the stator tests good you likely need a regulator. The only check to make on the regulator is to make sure it is properly connected with good connections and that it has a good solid ground.
I hope this helps. Please let me know if I can be of further assistance. Also, please leave a positive rating for my service. Thanks, P.J.