Most likely your VR is on the the way out, bulbs are cheap replace it before it fries relays and ECM. JMO
I have an 08 XB12S and within the last week, had 3 headlamp bulbs blown.
Having read similar problems on here, I checked battery voltage, 12.6v. Started engine and voltage went to 14.4v, revving showed no increase in voltage.
Am I correct in assuming this means the stator is working , as we have an increase in voltage on running, but the regulator is dead as no increase on throttle?
Most likely your VR is on the the way out, bulbs are cheap replace it before it fries relays and ECM. JMO
A VR going bad can cause intermittent voltage spikes and the symptoms you are having.
I don't think it should show that high of a voltage unless you rev it up so yes it's probably the VR, that's what I'd be replacing.
Cheers, confirmed my suspicions.
Only trouble is now, where to find one in stock! Might be better trying for Rocking Horse Poo!
Many thanks for the info, I had seen a post about the HD part, I assume that is the one that needs the wires extended and new mounting plate? I will look into that if I can’t find an OEM part for my bike.
Having searched internet extensively last couple of days, they do seem to be either not available or second hand in UK. I am waiting on a call back from Harley to see if they have one in they’re system.
I have had poor experience with buying second hand parts, last one I bought for my Buell I paid 60% of new price for a part that failed within 2 months and the seller was not interested. When I looked inside, it had been ‘fixed’ with 2 part epoxy! As the VR is a solid state unit, I have no way of confirming it works until I fit it.
Since you're in the UK... have you tried Twin Motorcycles in the Netherlands?
Last edited by Cutri; 12-15-2019 at 04:50 PM.