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Author Topic: Stator, can it go bad?  (Read 3818 times)

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Offline CB750 SS

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Stator, can it go bad?
« on: April 09, 2009, 06:41:08 AM »
I have a "charging issue" that just does not want to leave.  I've replaced with Rectifier and Regulator without an improvement.  As it's a 1976 (CB 750 SS), and I'm not great with the electrical stuff, I thought I start replacing parts and connectors.  It's cheaper than farming it out and given the age renewing seems like a smart play.   So I stand at the end of this and wonder, can the stator go bad?   I rebuilt (refreshed) the motor about 300 miles ago and it looked fine with little mechanical complexity.  How can it go bad??  BTW - bike has 44K+ miles

When I run the motor and test the battery terminals they read 11.8 @ 4000 rpm.  Obviously, after a ride the battery needs recharging.

Thoughts?

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Offline Bob Wessner

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Re: Stator, can it go bad?
« Reply #1 on: April 09, 2009, 06:44:55 AM »
This might help in tracking down the problem.
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Offline bryanj

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Re: Stator, can it go bad?
« Reply #2 on: April 09, 2009, 07:01:40 AM »
Anything CAN go bad but the stators rarely do, nor field coils----at least electricaly that is, mechanical joints at wiring connectors, including the soldered ones, do though
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Offline cb350twin

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Re: Stator, can it go bad?
« Reply #3 on: April 09, 2009, 01:55:36 PM »
Mine did.  The new one is AWESOME.
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Offline TwoTired

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Re: Stator, can it go bad?
« Reply #4 on: April 09, 2009, 02:16:48 PM »
You test the charging system with a known good, fully charged battery.  Not one that is depleted.

A decent battery is far stronger than the alternator output, even if it is discharged.

Best you can hope for during a test with a dead battery, is that the voltage is trending upward over time and the engine revved up.

The 750 stator can go bad if you used the stator cover as a skid plate for the bike, store it in sea water, or use a sufficiently high caliber projectile at high speed.
Making a stator bad usually takes human intervention.

Cheers,
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Offline bryanj

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Re: Stator, can it go bad?
« Reply #5 on: April 09, 2009, 02:21:00 PM »
TT I just love youre answers, i think if we got together no body would understand our humour!!
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Offline GammaFlat

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Re: Stator, can it go bad?
« Reply #6 on: April 09, 2009, 02:27:59 PM »
Check your rectifier.  Also, the connections in the white shell connections in three places are important to clean if not replace.  The rectifier connector, fuse holder connector and the one between the engine and "electrical panel".  All three are very important.  

TT is right (he has a habit of that).  Get your battery "up" but if you're having a hard time with that, as TT implies, watch your voltage while you are giving the bike some R's.  It should be on the rise as the alternator should out-pace your bike's electrical needs.  

A partially disabled rectifier (whether by bad connection or "cooked") can cause you to have a partially or completely disabled charging system.  A bad connection between the engine and "electrical panel" (8 conductor connector) can have a similar effect.  

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Offline SOHC4 Cafe Racer Fan

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Re: Stator, can it go bad?
« Reply #7 on: April 09, 2009, 02:51:10 PM »
It could be but there are many other things that might be the culprit.  I had a similar charging problem; replaced the rectifier/regulator, replaced the stator, and finally found the problem to be a tempermental short in my harness.  Fortunately for me, 754 gave me his old one that now works like a charm.
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Offline Johnie

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Re: Stator, can it go bad?
« Reply #8 on: April 09, 2009, 04:54:40 PM »
TT....you are killin' me.  Your answer is so honest, yet very true.  Keep 'em coming.  I needed a good laugh.  ;D
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Offline TwoTired

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Re: Stator, can it go bad?
« Reply #9 on: April 09, 2009, 07:25:41 PM »
Quote from: bryanj on April 09, 2009, 02:21:00 PM
TT I just love youre answers, i think if we got together no body would understand our humour!!

Few people on this forum understand my humor now, it seems.   ???  It does seem to be mostly democrats/foreigners, but perhaps they are just the most vocal (or the most offended)?  :-\
 Even when I tell them it's humor, I still get berated frequently.  I just put it out there, if you want to laugh, there's only yourself to stop you.  ;D

Be well!

P.S. Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so. -- Douglas Adams
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Offline mlinder

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Re: Stator, can it go bad?
« Reply #10 on: April 09, 2009, 07:54:19 PM »
ARE YOU INSULTING ME, LLOYD??
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Offline HondaMan

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Re: Stator, can it go bad?
« Reply #11 on: April 09, 2009, 08:04:07 PM »
Don't overlook the GREEN ground ring terminal under the seat. This is the whole electrical ground reference, and if this connection is bad, the field will never go to full charge mode. Make sure the frame is bare and the connection clean, and the wire good. They do get broken off once in a while.
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Offline CB750 SS

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Re: Stator, can it go bad?
« Reply #12 on: April 14, 2009, 09:00:26 PM »
it is sorted.  one of the yellow lines from the stator had a bad connection in the box.  I replaced all the connectors and now my bike is charging as it should.  thanks for the help!
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Offline bryanj

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Re: Stator, can it go bad?
« Reply #13 on: April 14, 2009, 09:34:50 PM »
There you go then, mechanical problem at a joint
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Offline CB750 SS

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Re: Stator, can it go bad?
« Reply #14 on: October 28, 2019, 09:57:46 AM »
turns out it was was the wires coming from the stator to the junction box under the seat.  now corrected and energy is flowing
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Offline Scott S

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Re: Stator, can it go bad?
« Reply #15 on: October 28, 2019, 10:23:30 AM »
 Dang, and it only took ten and a half years to sort it out! :))
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Offline PeWe

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Re: Stator, can it go bad?
« Reply #16 on: October 28, 2019, 11:28:15 AM »
....as reply #12
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