almon777

Thanks for that info. I'm starting to suspect something up in the stator. I have a 2nd battery, behavior is the same with both so that's out. Seems like after some rides the battery is 100% charged, and after other rides it's not charged well at all. I agree the stator is a more likely item to have intermittent behavior. I'm going to try some testing on the stator and see what I find. Thanks, Al

I replaced my OEM regulator with a FH0012AA unit from a Yamaha R1. I bought he FH0012AA used off of ebay. When I first installed it and when I start the bike in the morning the voltage at the battery is 14.3 volts. I was psyched thinking I cured the charging problems I was having. However, I decided to check the voltage when I got home after riding the bike for a while and the voltage moves around from high 12's to mid 13. My question is: DO these regulators put our a constant charging voltage or do they cycle based on how much charge is in the battery? I expected the voltage to stay fairly constant around 14.25 or so. If it's supposed to be constant then I've got a problem, however if the regulator output can vary depending on the state of charge of the battery, then maybe I'm worrying over nothing. Fyi, I installed the FH0012AA with a wiring harness made for it that goes directly to the battery. Any thoughts about this would be greatly appreciated! Thanks! Al