Have an '08 FLHTCU w/45k miles...have been having an issue with it at least a dozen times. Ridin' and the low voltage battery light comes on. Voltage meter drops down below 12v but bike doesn't stumble. Pull over, shut down and start...ride and voltmeter goes up. Happens time to time and replaced battery and still an issue. I'm wondering if it's the voltage regulator acting up...need to replace it?