Stator testing


Information and questions on GL1200 Goldwings (1984-1987)
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Krazywolf8169
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Location: Glenmoore PA
Motorcycle: 1984 gl1200 aspencade

Stator testing

Post by Krazywolf8169 »



Need the testing procedure to test stator



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DenverWinger
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Re: Stater testing

Post by DenverWinger »

Stator wires need to be disconnected from the bike for this testing.

Call the three yellow wires coming from the stator "A", "B" and "C". Set your volt meter to AC volts and with engine at 3000 RPM you should measure on the order of 50-70 volts AC between wires A & B, A & C, and B & C.

What we are looking for is all three voltage readings to be roughly the same at 3000 RPM. Final test is to measure ohms between one of the yellow wires and ground. Should be no reading (open circuit).

If stator passes these tests you can call it good.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

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Krazywolf8169
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Re: Stater testing

Post by Krazywolf8169 »

Can this test be performed by disconnecting rectifier and testing the stator wires the three yellows at the rectifier plug?

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Krazywolf8169
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Re: Stater testing

Post by Krazywolf8169 »

Also thank you for the reply

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DenverWinger
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1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Stater testing

Post by DenverWinger »

Yes, you can do the test at the rectifier plug.

Check to see that the stator connector down by the battery has been eliminated. Famous failure point, can cause stator failures. Most people simply cut off the connectors and then solder the wires together. If it still has the connector you could do the tests there before soldering.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

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Krazywolf8169
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Re: Stater testing

Post by Krazywolf8169 »

Already removed that's why I asked if it could be done from the rectifier plug

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wongsol
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Motorcycle: 1984 GL1200 - Mad Max

Re: Stater testing

Post by wongsol »

Checking the state of the stator is the first thing you do when buying a used Wing. If it's faulty, you can immediately knock off $500 (to start) off the asking price. My last buy was basically for $100 based on all the fixes needed just to get her running. In fact, it's the second time I bought a Wing for 100.

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Krazywolf8169
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Re: Stater testing

Post by Krazywolf8169 »

Wongsol I've had the bike for 3 years now fixed the stator connector plug when I got it have the same battery I installed when I purchased it still in it however it wouldnt start the other day so put the meter to it and it's only at 12.6 volts at battery terminals at 3k rpm.

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Krazywolf8169
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Re: Stater testing

Post by Krazywolf8169 »

Ok Denverwinger
I'm at the lower side slightly below 50v a to c and b to c and little over 50v on a to b and infinite ohms on all three legs to ground. try a new rectifier?

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DenverWinger
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1980 GL1100 STD Vetter (2005-)
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1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Stater testing

Post by DenverWinger »

Probably, but let's do some checks first. Do these voltage measurements at 3000 RPM. First be sure the connections in the plug to the Rec/Reg unit aren't burnt or corroded

1) With Rec/Reg unit connected measure volts between green rec/reg wires and battery neg post. Should be pretty close to 0 (note down any reading). This is voltage drop test on Ground side.
2) Measure from battery Pos terminal with Meter Neg to Red rec/reg wires with meter pos lead. Again should be measuring close to zero. This is voltage drop test on Hot side.
3) Measure again from Battery Pos terminal to rec/reg black wire. Again should be around zero to maybe half a volt. This is the voltage drop to the Rec/Reg voltage sense line.

Report back the readings. Any major departure from near zero indicates a bad connection somewhere. And if all readings are near zero and still only 12 v or so at the battery at 3000 RPM we can call the Rec/Reg highly suspect!
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

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Krazywolf8169
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Re: Stater testing

Post by Krazywolf8169 »

Green to ground is .08
Both red to ground is 12.4
Black to pos 1.2

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DenverWinger
Posts: 1522
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
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1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Stater testing

Post by DenverWinger »

No wiring faults that would cause a no-charging condition. Black to pos is a little on the high side, but that would cause slight over-charging if it did anything.

So it's time to try another Rec/Reg unit.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

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Krazywolf8169
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Location: Glenmoore PA
Motorcycle: 1984 gl1200 aspencade

Re: Stater testing

Post by Krazywolf8169 »

That sounds like good news to me lol thanks for the help I greatly appreciate it

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Krazywolf8169
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Location: Glenmoore PA
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Re: Stater testing

Post by Krazywolf8169 »

Also any recommendations on where to get new rectifier and brands to use or not to use?

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DenverWinger
Posts: 1522
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Stater testing

Post by DenverWinger »

There's good reports on this one. Newer MOSFET technology, and it is "Plug-and-Play" on Goldwings.

https://ricksmotorsportelectrics.com/Ho ... or-10_105H

Pretty much any model three-phase Rec/Reg can be adapted in and will work as long as it's rated 500 watts or better. You can surf the web and look around.

OEM regulator is old style "Shunt" type, regulates voltage by shunting excess voltage not needed by bike electrical system to ground. Stator runs at full output constantly.

Newer MOSFET "Series" type regulators work by only passing the current needed by bike electrical system to maintain correct voltage, current not needed is not grounded out but blocked instead. Stator is NOT running at 100% full output all the time.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

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Krazywolf8169
Posts: 48
Joined: Mon Jul 17, 2017 5:02 am
Location: Glenmoore PA
Motorcycle: 1984 gl1200 aspencade

Re: Stater testing

Post by Krazywolf8169 »

Well picked up a stock style didnt have the extra money for the mosfet on at this time however it still only charging around 12.6v so not sure where to go from here.



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