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Battery not charging - what else to check

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Underdog1:
Got an issue with my battery not charging, just runs down when I ride it and needs kick starting pretty much on any start up where it’s not just come off a trickle charger, run fine and hasn’t failed in getting me home yet but obviously I’d like to sort this, I’m unsure whether a severely discharged battery will stop the bike kick starting..?

So the battery is a new AGM one, my reg rec is a solid state ‘RR24’ from M and P (think it’s the same one wemoto sell) and my harness is simplified to avoid the safety gubbins.

What I’ve checked so far:

Fuses - all good
Battery was at 12.71v with ignition off
Dropped a bit as it failed to start off the e start so had to kick it, voltage was at 11.63 at 4K rpm
Resistance from neg battery lead (disconnected)  to black regulator wire is 0.05ohm (on 200 setting)
Resistance between yellow stator wires (checked at the connector block) are all 0.8ohm (on 200 setting)
Resistance of the stator wires in the main harness itself are all 0.4ohm (on 200 setting) but I get the same value when I touch the multimeter test wires together so I guess this is as low as it goes.
Resistance from the green wire on the Reg/red to the yellow stator wires is between 179 and 200ohms (on 200 setting). From the red wire on the reg/red to the yellow stator wires it’s 178-180 ohms.

Unsure what else to check? Was hoping it would be obvious but electrics is still something I’m getting to grips with. Have checked for any obvious corrosion or mismatched wires, the main harness is new and the other bits have all had their connectors cleaned.

Any guidance much appreciated!

hairygit:
The internal battery in your multimeter! Touching the wires together should give a reading of 0  Zero, whatever scale it is set to for Ohms. Any reading other than Zero with the leads shorted points to a low battery, no point testing anything if the meter is not reading correctly!

Underdog1:

--- Quote from: hairygit on September 29, 2018, 07:14:27 PM ---The internal battery in your multimeter! Touching the wires together should give a reading of 0  Zero, whatever scale it is set to for Ohms. Any reading other than Zero with the leads shorted points to a low battery, no point testing anything if the meter is not reading correctly!

--- End quote ---
It’s a new battery in a new multimeter, was only £5 so probably Chinese build quality letting me down. Will have a fiddle around with it tomorrow

hairygit:
There is often a pot inside which is adjusted to give a reading of zero, but without a wiring diagram it could be a nightmare trying to find it!

Sent from my X6pro using Tapatalk

kevski:
I recently sent 3 RR24 reg/rec's back to M&P's all of them not working correctly, got a refund in the end, i then got a UK made RR24 from elcterexworld, more expensive but worked correctly from the moment i fitted it, seems there is a dodgy batch at M&P and they are happy to keep selling them, when i get things like this i only cut the corners off of the bags they are in just enough to get the plugs out, i then test run them, the reg/rec's never leave the bag until i am sure they are good.

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