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Old 12-27-2011, 04:17 PM   #1
Uncle Pollo OP
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Location: Albuquerque, Neue Messico
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Erratic red charging light behavior - 86 r80

Off idle - flickering red.

Sometimes cuts off 1200ish

sometimes higher.

Brush pack?
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Old 12-27-2011, 04:35 PM   #2
Quasi1960
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Quote:
Originally Posted by PolloAsesino View Post
Off idle - flickering red.

Sometimes cuts off 1200ish

sometimes higher.

Brush pack?

Probably.
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Old 12-27-2011, 05:05 PM   #3
Uncle Pollo OP
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Originally Posted by Quasi1960 View Post
Probably.
If not; what else?
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Old 12-28-2011, 12:52 AM   #4
Wirespokes
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Perhaps nothing is wrong. If it goes off and stays off, I wouldn't worry about it. Some of the differences are state of battery charge and temperature. The voltage regulator regulates differently when hot than cold.

If it goes out, and stays out, by 1200 RPM, there's nothing to worry about.
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Old 12-28-2011, 06:07 AM   #5
Uncle Pollo OP
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Quote:
Originally Posted by Wirespokes View Post
Perhaps nothing is wrong. If it goes off and stays off, I wouldn't worry about it. Some of the differences are state of battery charge and temperature. The voltage regulator regulates differently when hot than cold.

If it goes out, and stays out, by 1200 RPM, there's nothing to worry about.
It's been -7 celcious consistently.
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Old 12-28-2011, 07:04 AM   #6
eepeqez
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Location: Melbourne, Australia
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Quote:
Originally Posted by PolloAsesino View Post
Off idle - flickering red.

Sometimes cuts off 1200ish

sometimes higher.

Brush pack?

It's not like its a major voyage of discovery to get far enough in to see what they're like!

Flickering does suggest dodgy continuity which worn brushes will certainly provide.

Other possibilities include:
Field (rotor) or stator winding faults, but these tend to go bad and stay bad, not flicker.
Voltage regulator failing - but it's an electronic regulator, not mechanical, so they're usually pretty reliable.
Loose connection anywhere in the alternator wiring, especially voltage regulator, warning lamp, brushes (ah, we'r back where we started).
Loose battery terminal.
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Old 12-28-2011, 09:56 AM   #7
Speedzter1969
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Location: The Burbs, NY
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My experience has been this:
One night, whilst going to meet a friend for a ride down to NYC, the GEN light started to flicker. The diode board had been replaced a year prior, but this was different. Get to his house, pull off the front cover and checked brushes, connections, etc. The voltage also dropped to about 12.5 when the light was flickering. We go off on down to NY, and no problems. Next day same thing. I replaced the brushes, which were fine, and didn't help. Swapped out stator from other bike, as well as voltage regulator. Last thing was the rotor, ordered up a new one, and that was it.
I hear that once rotors "go", they "go". Mine was intermittent, so no one believed that was it. My gut told me it was.
I now have a pretty much new electrical system now that will probably last another 20 years.
When the diode board went, the GEN light glowed dimly at night. I am becoming well-versed in these electrical gremlins. Seems all my bikes have had them at one point or another.
Good luck!
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Old 12-28-2011, 10:28 PM   #8
Uncle Pollo OP
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Rotor ... mmhm .... where the hell it is?
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Old 12-28-2011, 11:26 PM   #9
robtg
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Quote:
Originally Posted by PolloAsesino View Post
Rotor ... mmhm .... where the hell it is?

Ask Newt.
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Old 12-28-2011, 11:38 PM   #10
Uncle Pollo OP
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Originally Posted by robtg View Post
Ask Newt.
Aw ... I will change my avatar and signature soon.

It's a prank about the least likely and able being my favorite.
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Old 12-29-2011, 02:53 AM   #11
bmweuro
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Drink more beer and close one eye:) Your probably fine.
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Old 12-29-2011, 08:42 AM   #12
bereahorn
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Old 10-15-2012, 09:45 PM   #13
Uncle Pollo OP
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It was the brushes
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