Does anyone know how to test a voltage regulator for this machine? My clymer manual gives no specs at all. The bike is producing 14 volts with battery charged. Terminals and connections have been cleaned. When at an idle turning on the lights kills the engine. Revved it stays running and I can return to idle and now turn lights off and on as I please. I'm being led to the voltage regulator but would like to be able to test it to be sure. Any ideas would be greatly appreciated