[TLRam1]

I am having a little erratic behavior voltage from my bike, maybe need to clean all the connecting plugs from the charging circuit.

Where are they?   

[hootmon]

Under the seat...
There is one white connector with 3 yellow wires. This one is the wires from the Stator to the regulator.
There is a larger white connector (usually behind the frame bar right in front of the rear fender) that has black and red wires. This is the DC wires coming back from the regulator.
Use a volt meter...
You should see about 14.7 volts with the motor above 1500 RPM..

[TLRam1]

Thanks Harry, that is the info I was looking for.

[TLRam1]

There is a larger white connector (usually behind the frame bar right in front of the rear fender) that has black and red wires. This is the DC wires coming back from the regulator.

I don't understand this sentence, did you mean going from the regulator to the battery?

[hootmon]

Yes.. The larger connector comes from the Regulator and goes toward the battery (the DC side of the Regulator).
The smaller connector also goes to the Regulator, but comes from the Stator.
My 1st Magna had a bad regulator when I bought it (I did not know it) and it was overcharging..
Burnt up the battery and the 2 connectors..

[TLRam1]

It is charging just some erratic behavior, I may just buy another regulator and install if it is hard to get to the connectors you mentioned. If I see it being pretty easy I will check the connectors first.

[hootmon]

Both connectors are under the seat, you just need to find them in the nest of wires..
Changing the Regulator is the PITA...
It's mounted to the bottom of the battery box..
Small hands help
I made a mount and moved mine right behind the right side cover.

[Sledge Hammer]

Hey, Terry, when you say "erratic behavior" what specifically have you observed?

[TLRam1]

It is slow to go up in voltage, could be always the way it was, just don't remember. Driving another time it was lingering around 12.8 and slowly get up to 13.3 or 4.

Currently other then the slow climbing voltage it tops out at 13.7, with all electrics off it would bust into the 14 volt range, now when at idle it will go into the 14 volt range, with some revs the voltage drops.

Just strange that might be connection issues, might not.

[Sledge Hammer]

I'm wondering if the stator is going bad. It could be a regulator failure, but from the reading I've been doing on the shunt regulators, they can stress the stator when they fail.

[TLRam1]

Could be I guess but a stator is wound and for it to go I would think a wire breaks and it's gone for the most part.

[Sledge Hammer]

Yeah, definitely a broken wire would leave Tango Uniform, but if it gets too hot, the varnish on the magnet wire can break down and then you get interwinding shorting that can change the magnetic characteristics. In the worst cases, you'd lose a pole but it wouldn't have to be that dramatic before you'd get an imbalance in the phases.

By all means check the easy stuff like connectors first, but if they look okay, might be a good idea to pop the cover off and have a look at the windings.

[TLRam1]

I will try the connections first, then regulator, then south of that.

[hootmon]

I've been observing (forums) and owning Gen 3's for 15 years..
I have heard and experienced:
Connector failure - usually due to corrosion over time
Regulator failures.. I've had several, both over and under voltage. I have seen at least 100 bad regulators by others.
I have only heard of ONE, yes 1, confirmed bad stator on a Gen 3.. So could it be a stator, sure.. But not very likely..

[TLRam1]

Do you mean these two sets of wire in the metal frame holder?