Clinician
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Post by swanie2000 on Dec 29, 2011 20:40:53 GMT -6
Hello All, I have a 50cc peace sports scooter. The battery will not charge. I have replaced the stator, and then the regulator, then the regulator again, and then I replaced the stator, regular & flywheel all at the same time, then I replaced the regular three more times. I have 5 rectifier regulators here, and two stators, and I cannot get the scooter to charge the battery.
The Stator has 3 wires white/green/yellow. The green wire goes to frame ground. Between frame ground and the white wire, I can get up to 65VAC while the stator is disconnected from the rest of the circuit. Also from frame ground to the yellow wire I can get up to 75VAC while the stator is disconnected from the rest of the circuit.
When the stator is plugged in, and the RR is unplugged, it blows out the headlight. This is expected as the yellow wire is not clamped down to a safe 13VAC while the RR is unplugged. If you plug in the RR, the yellow wire will clamp down the AC to a safe level, and spare the headlight lamp from further abuse.
When the RR is plugged in, the white wire to ground now shows about 16VAC. After it goes through the half wave rectifier, it comes out on the red wire and just about half voltage, 7-8VDC. This is not enough to charge a 12VDC battery.
I was certain I was getting a 6VDC RR, since the 7-8VDC output would be right on par with a 6VDC battery. I have now purchased these regulators from 3 separate sources, hoping to find one that was 12VDC.
SO far, every RR I have received has worked the same way, and resulted in much the same voltage levels. I find it hard to believe that all 5 are bad, in the same way? Just not likely.
Next I have swapped the yellow and white wires, on the RR. This resulted in a dim headlight, as it was now only getting the 7-8VDC instead of the correct 13VAC it likes. So I figured the yellow and white wires were correct in the first place, and put them back like they were. That of course brings me back to a working headlight, and no charging voltage.
I am pretty much lost as to what else it could be; the circuit seems pretty straight forward. The yellow wire runs the headlight, and is AC, clamped to 13VAC, and the white wire runs the half wave rectifier, and is supposed to charge the battery.
Can someone please point me in the right direction?
Michael
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Post by Bashan on Dec 30, 2011 14:51:10 GMT -6
Well first of all this is the generally accepted pin/wire color configuration for a GY6 rectifier:
Now what baffles me is that a normal GY6 stator should have around these raw frame to wire voltages:
Those values you're getting are off the chart. I'm surprised the regulator/rectifier can even handle that. Did both of the stators you tried do exactly the same thing? Plus, your white wire should be more that the yellow wire. Something is very odd here. Did your scooter always do this or did this just start. If it did just start was it slow or immediate? Is this a new scooter or used? Rich
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Scooter Doc
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Post by sprocket on Dec 30, 2011 15:58:37 GMT -6
Does the scooter engine run? How many stator poles? Is your CDI AC with a dedicated pole CDI on the stator?
I think you have the wrong stator...could be a floated ground type or visa versa...
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Post by Bashan on Dec 31, 2011 11:02:17 GMT -6
Those voltages are way too much for any stator aren't they Chris? I don't even see if it's wired wrong and the whole winding is ending up on one wire with a ground how it would do that. Rich
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Doc's Anything Goes
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Post by tvnacman on Dec 31, 2011 12:42:30 GMT -6
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Scooter Doc
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Post by sprocket on Dec 31, 2011 17:03:18 GMT -6
I have seen 65 to 90 volts from the dedicated ignition pole on an 8 pole AC fired CDI stator, but never on the white or yellow...you are lucky to get 20 volts...
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Doc's Anything Goes
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Post by tvnacman on Dec 31, 2011 18:07:43 GMT -6
Sounds like he is reading from the ignition ckt Johb
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Post by Bashan on Jan 1, 2012 11:06:40 GMT -6
John here's the two links you may be looking for that complete the 8 to 11 coil upgrade:
Coil Upgrade #1Coil Upgrade #2However, this gentleman's problem is that his stator is cranking out way too much voltage for the R/R to handle. He says he's not testing the magneto coil but that's the kind of voltage it sounds like. Rich
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Scooter Doc
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Post by sprocket on Jan 1, 2012 11:58:46 GMT -6
Stators just don't make those volts on yellow and white...there simply isn't enough windings on the poles.. the only way this could happen is if the ignition coil has shorted into the other coils, in which case the stator is finished
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Post by Bashan on Jan 1, 2012 12:41:41 GMT -6
Ah, now there's an explanation that makes sense, good job from the venerable Sprocket. Rich
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