would you replace a stator with these readings?

[tkent02]

It is a Y (wye) configuration. And it will put out AC power from wire to wire if not plugged in to the regulator.

Um, that's what the stator is for, to make AC voltage. With or without a regulator, it's making voltage if the rotor is spinning... Why would this make the stator bad?

Should be about 60 or 70 or so volts AC if the stator is disconnected.

[Graham]

Um, that's what the stator is for, to make AC voltage. With or without a regulator, it's making voltage if the rotor is spinning... Why would this make the stator bad?

Should be about 60 or 70 or so volts AC if the stator is disconnected.

Plugged in and key off could drain battery over time. Running, maybe burn up regulator, under/over charge battery and burn up ignitor box.

[tkent02]

Maybe you need to rewrite the stator papers, obviously Pos got it all wrong.

[posplayr]

Plugged in and key off could drain battery over time. Running, maybe burn up regulator, under/over charge battery and burn up ignitor box.

In theory there are three blocking diodes (standard SHUNT R/R) with cathodes attached to the Red R/R output (+) so no current can flow into that point (the diodes block current flow) so there is no place for current to drain into or through the R/R unless one of those diodes is shorted.

[tom203]

Three phase ac circuits- what a fun topic ( Google Tesla for fun!). Anyways, yes delta or wye is possible; delta produces less voltage, but more current- but power ouput is the same. P= 1.73 VI where V is voltage between any two legs and I is current coming out of any leg. It appears that to get a decent voltage output (at low speeds), most charging systems would be wye connected, assuming a non-variable revolving field (plain old magnets).When I replaced my stator in August- it had shorted to ground producing little output- It was wye wound. Breaking the wye, one stator winding was shorted to ground. The other stators I have are also wye wound. I did not replace my r/r- it had not been affected by stator failure.
Maybe, some of the windings being done these days are different (or plain wrong). More thought needed on how shorted to ground stators can produce decent charging output- I hope everyone is using multimeters correctly!

[don_gibb6512]

Will test again using a different meter that has a fixed low ohm setting of 200. I take it that readings across two stator wires should equal twice the reading from any one wire to ground because reading across two wires adds the resistance in the series circuit.

[Matchless]

If the stator tests show a short or very low resistance to the case when testing on the three AC wires, you will most likely get it on all 3 wires.
If the windings on the stator show no signs of burned or melted insulation then you very likely have a solid copper wire making to ground outside of the actual winding area.

Have a close look at the 3 tails that are soldered together, sleeved and tucked in behind the coils. Also have a close look at the 3 tails on the front going to the 3 AC wires. If any of them touch a corner of the stator frame, the insulation can be damaged and could cause the short to ground.
If so you could save a stator by moving and/or sleeving those wires and also fitting 3 new AC wires at the same time.

Hope this helps

[Graham]

Maybe you need to rewrite the stator papers, obviously Pos got it all wrong.

I’m not saying posplayr is wrong. I’m just an old school motorcycle mechanic with old school ways.

[tkent02]

I’m not saying posplayr is wrong. I’m just an old school motorcycle mechanic with old school ways.

Sell parts, that's the job.

[don_gibb6512]

If you read any voltage (while running and unplugged) from stator wires to ground (casing) buy a new stator.

I'll try this in addition to retesting with different meters. Hadn't considered doing this while the bike was running. Thanks.

[don_gibb6512]

It does help and thanks. If I still get a reading using the other meters that I borrowed yesterday, I'll open up the case and take out the stator. Really wanted to avoid that this late in the season.

If the stator tests show a short or very low resistance to the case when testing on the three AC wires, you will most likely get it on all 3 wires.
If the windings on the stator show no signs of burned or melted insulation then you very likely have a solid copper wire making to ground outside of the actual winding area.

Have a close look at the 3 tails that are soldered together, sleeved and tucked in behind the coils. Also have a close look at the 3 tails on the front going to the 3 AC wires. If any of them touch a corner of the stator frame, the insulation can be damaged and could cause the short to ground.
If so you could save a stator by moving and/or sleeving those wires and also fitting 3 new AC wires at the same time.

Hope this helps

[don_gibb6512]

Going to bed. Gonna shoot pool tomorrow night and do something that I'm actually good at. Cheers.

Didn't sleep a wink Sunday night and got clobbered at pool last night. If anyone wants to get in some kicking, now's the time to do it. Geesh.

[don_gibb6512]

Test results with an Metex M-3800 digital multimeter set at the 200ohm range. Stator wire-wire came out to 1.1, 1.2 and 1.1. Wire-ground test came out to the SAME readings 1.1, 1.2 and 1.1.

So, the first test using the Radio Shack meter results were basically .4 on both sets of tests and this time it's basically 1.1 on both sets of tests.

Other than the meters are obviously using different range settings, does anyone have any input????? I won't be able to yank out the stator for further inspection until this weekend.

Thanks

Don

[tom203]

Test results with an Metex M-3800 digital multimeter set at the 200ohm range. Stator wire-wire came out to 1.1, 1.2 and 1.1. Wire-ground test came out to the SAME readings 1.1, 1.2 and 1.1.

So, the first test using the Radio Shack meter results were basically .4 on both sets of tests and this time it's basically 1.1 on both sets of tests.

Other than the meters are obviously using different range settings, does anyone have any input????? I won't be able to yank out the stator for further inspection until this weekend.

Thanks

Don

You edited your earlier post to say you get only 12.08 volts at 5k rpm. This means your charging system ain't producing.
This is the result I got when my stator shorted to ground; but my r/r wasn't damaged. (original r/r)
As far as stator wires to ground test- It was asked before..."U are measuring resistance between the legs to ground when the stator wires are open right?" ???

[don_gibb6512]

You edited your earlier post to say you get only 12.08 volts at 5k rpm. This means your charging system ain't producing.
This is the result I got when my stator shorted to ground; but my r/r wasn't damaged. (original r/r)
As far as stator wires to ground test- It was asked before..."U are measuring resistance between the legs to ground when the stator wires are open right?" ???

Yes but I am getting 64v AC out of the stator at 5K rpm's though. I work in the Dept. of Electrical & Computer Engineering at the Ohio State University and I've asked one of our Power Faculty to think about this. The fact that I'm getting resistance through the winding yet AC output is odd at best. That I'm getting the same measurement across the wires as wire to ground doesn't make any sense either. Wire - wire should be twice wire to ground. The RR had a burnt connection in the ground wire and test results on that determined that the Rectifier circuit went bad. I had an independent test done on the RR to verify my findings. I haven't ran the resistance test on the stator, wire to ground while the bike is running yet but I honestly don't see why that would be different than if the bike wasn't running. But then, I'm NOT an electrical engineer so I always assume there might be something I'm missing.

Thanks for the reply. Don