Alternator - Page 4 - GL1800Riders
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post #31 of 51 (permalink) Old 03-19-2017, 09:38 AM
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I've found it to be a good practice that if I worry about something going bad, In your case it appears you have some concerns about the alternator, I'd change that thing before a long trip so I/you don't have to worry about the 'when". I don't plan on spending part of my ride with grease on my hands.
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post #32 of 51 (permalink) Old 03-19-2017, 04:59 PM
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at what mileage are you guys seeing alternators start to fail?
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post #33 of 51 (permalink) Old 03-19-2017, 09:38 PM
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Quote:
Originally Posted by Chris183 View Post
at what mileage are you guys seeing alternators start to fail?

Usually between 80-130k miles an OEM alternator becomes risky.... YMMV!


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post #34 of 51 (permalink) Old 03-19-2017, 10:12 PM
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Mine has 155,000 miles and still working ok, decided to replace as preventive maintenance.

2008 Titanium Gl1800
G709 @ 39 psi
Yokohama Avid Envigor ZPS RFT @ 28 to 30 psi
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post #35 of 51 (permalink) Old 03-20-2017, 06:25 AM
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Another option is local rebuild. I paid $80 and got OEM brushes and bearings.

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post #36 of 51 (permalink) Old 03-20-2017, 10:21 AM
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My first alternator was replaced under warranty at 69,000 miles. 135,000 miles later it was replaced the second time under warranty. When warranty ran out I bought a brandnew 2010 alternator and started hauling it around in the right saddlebag. When the second warranty replacement alternator had 170,000 miles I started to notice it squeak on cold startup, it turned out to be a bad bearing so I installed the brandnew 2010 alternator and had the 170,000 alternator rebuilt locally for $80 with Honda parts. The 2010 alternator now has 104,000 miles and so far no issues with it.

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post #37 of 51 (permalink) Old 03-23-2017, 03:27 PM
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I just received my new OEM Alternator from AJ-Electric which cost me $140.


With the alternator came a test result sheet....some of which I don't understand, but you techno geeks would. This is just a FYI post. I don't need to know what I don't understand which is most of it.


Max output: 102 Amps
Max output power: 1373 watts
Voltage Regulator Set point: 14.3 Volts
Leakage current tested at 12V.: 0.70 mAmps
Ripple current @ 2500 RPM: 24 Amps
Turn on speed less than: 1600 RPM


Alternator RPM 1800: Amperage 54
Alternator RPM 2000: Amperage 64
Alternator RPM 2400: Amperage 77
Alternator RPM 3500: Amperage 93
Alternator RPM 5000: Amperage 100
Alternator RPM 6000: Amperage 102


There was no mention how Alternator RPM related to engine RPM; if it was a 1:1 ratio or some other variable. If 1:1 ratio it seems I'd have to be running with the tach at 2400 RPM plus to be getting full charging. I usually run one gear lower to keep RPMs around 3000 anyways as I don't want to ride it around with less than that and lug the engine down if I roll the throttle on.


Allen


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post #38 of 51 (permalink) Old 03-23-2017, 10:39 PM
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Quote:
Originally Posted by roadrunner1800 View Post
I just received my new OEM Alternator from AJ-Electric which cost me $140.


With the alternator came a test result sheet....some of which I don't understand, but you techno geeks would. This is just a FYI post. I don't need to know what I don't understand which is most of it.


Max output: 102 Amps
Max output power: 1373 watts
Voltage Regulator Set point: 14.3 Volts
Leakage current tested at 12V.: 0.70 mAmps
Ripple current @ 2500 RPM: 24 Amps
Turn on speed less than: 1600 RPM


Alternator RPM 1800: Amperage 54
Alternator RPM 2000: Amperage 64
Alternator RPM 2400: Amperage 77
Alternator RPM 3500: Amperage 93
Alternator RPM 5000: Amperage 100
Alternator RPM 6000: Amperage 102


There was no mention how Alternator RPM related to engine RPM; if it was a 1:1 ratio or some other variable. If 1:1 ratio it seems I'd have to be running with the tach at 2400 RPM plus to be getting full charging. I usually run one gear lower to keep RPMs around 3000 anyways as I don't want to ride it around with less than that and lug the engine down if I roll the throttle on.


Allen


@techdude2000 @Waldo
The alternator rpm is 2.57 times the engine rpm on the 01-05 bikes and it's 2.74 times the engine rpm on the 06 and later bikes. This means this alternator will output 100A when you have the engine at 1,946 rpm.

Rob's Candy Red '04

Last edited by techdude2000; 03-23-2017 at 10:44 PM.
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post #39 of 51 (permalink) Old 03-23-2017, 11:24 PM
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Those of us (01-05) who had to replace our noisy alternator drive assembly with the new improved model picked up some extra amps, at the same RPM, that we didn't know about.

Thanks techdude2000
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post #40 of 51 (permalink) Old 03-24-2017, 07:01 AM
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[QUOTE=roadrunner1800;4227609]I just received my new OEM Alternator from AJ-Electric which cost me $140.

So these are actually OEM alternators? The same you would buy from the dealer?
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