Overvoltage error 2015 help please

[Scrappy600]

Looking for a few opinions on this. I know there's a good few posts about overvoltage but I'm having difficulty pinning it down to a definite cause with the evidence I've gathered.

Replaced battery last year for brand new one as old one died and wouldn't hold charge. Shortly after, whilst riding, I got the overvoltage error that shut the dash down but it never happened again after that, albeit I didn't do a huge amount of miles.

Back to 3 weeks ago and I got out on the bike again and on my first ride on the way back home i got the error again which cleared itself eventually after a couple of cycles of it resetting the dash.

Last week it did it again on the way back from a ride and I discovered the error actually kills the headlights and horn after a muppet tried to cut across me in traffic and I had no horn.

Battery is always kept on a tender and has very low mileage on it since bought in November 23.
I've done the regulator diode test and a ton of voltage tests on the stator and battery and would appreciate some feedback on the results I'll post.

I had run it by Phil Crowe on FB and he suggested the battery fixes a lot of overvoltage issues they see but I don't want to just throw money at it replacing a battery I've only just replaced last season and then find out its stator or reg/rec

Reg/rec diode test


Stator and battery voltage tests

 

[scooby]

i suppose the easiest thing to try solve it would be to find out is what the over voltage error refers to, i.e. from reg/rec into battery or battery output voltage. the v figures in you notes look ok (as far as i can see) but if it's an intermittent fault then the readings aren't going to tell you much. for me, i'd be swapping he rectifier out to see if the issue persists, you can get them relativley cheap

 

[JamieMac]

Always found over voltage was caused by a faulty regulator/reg. Had it numerous times on various bikes. All my bikes run the same reg/rec so always have one to hand.