My Bike stopped charging last night - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 33 (permalink) Old 07-19-2018, 10:40 PM Thread Starter
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My Bike stopped charging last night

Got home, put a known good battery in, she started right up but is not charging.

Should I buy Regulator and Regulator and put it to rest or do we think it could be the stator?

Where can I get these part at a reasonable price?


Maybe some info may help??

2000 RC51 SP1
60,000km
Power commander, mostly stock. Hindle exhaust
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post #2 of 33 (permalink) Old 07-19-2018, 11:26 PM
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You need to test it. Based on the information given there can't be any reasonable reply to your question.

Get a multimeter and check the ac output of the stator and the DC output of the RR.

It's a very simple procedure
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post #3 of 33 (permalink) Old 07-20-2018, 01:16 AM
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here i'll break it down for you, i'm going to assume you've already tested voltage at the battery and found that it doesn't climb to charging voltage (~13.8-14v when revving over idle)


unplug the stator connector, then start the bike. with your multimeter set on AC volts (the V with the ~ on top), check volts between each of the yellow wires (there are 3 wires, so check 1-2, 2-3, and 3-1)

at idle you should see around 20ish volts, with the engine revving you should see around 50ish, maybe a bit more. all three of these voltage readings should be similar, if one is very low the charging output of your system will be much lower than it should be.


if the stator checks out good, it's the RR, if the stator checks out bad, change it before you change the RR. there are MANY MANY parts sold and replaced that weren't faulty, people just pour money over their problems.
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post #4 of 33 (permalink) Old 07-20-2018, 06:13 PM
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Quote:
Originally Posted by Wibbly View Post
here i'll break it down for you, i'm going to assume you've already tested voltage at the battery and found that it doesn't climb to charging voltage (~13.8-14v when revving over idle)


unplug the stator connector, then start the bike. with your multimeter set on AC volts (the V with the ~ on top), check volts between each of the yellow wires (there are 3 wires, so check 1-2, 2-3, and 3-1)

at idle you should see around 20ish volts, with the engine revving you should see around 50ish, maybe a bit more. all three of these voltage readings should be similar, if one is very low the charging output of your system will be much lower than it should be.


if the stator checks out good, it's the RR, if the stator checks out bad, change it before you change the RR. there are MANY MANY parts sold and replaced that weren't faulty, people just pour money over their problems.
Word

And I happen to have a handy picture for what you just described.
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John, 2000 RC51 #000100

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post #5 of 33 (permalink) Old 07-20-2018, 07:06 PM
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This should help too. This thing is awesome.

https://www.electrosport.com/media/p...ng-diagram.pdf
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post #6 of 33 (permalink) Old 09-15-2018, 11:28 AM
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Where is the connector I need to check the stator?
The picture above is different than my bike.
I have a 2000 SP1'
I think this connector is in a different location
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post #7 of 33 (permalink) Old 09-15-2018, 11:41 AM
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OK, sorry I found it. There is good voltage coming out of the stator, but the connector is toasted. It is very black and partially melted.
Still OK, but fried.

Is the the rectifier making it so hot?
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post #8 of 33 (permalink) Old 09-15-2018, 12:01 PM
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A bad connection/corrosion makes a hot spot. You have the same amount of power trying to go through a smaller connection , it gets hot. Replace the connector and use dielectric grease on the new one when you put it back together. Use the DE grease on any other connector you can get at , it stops corrosion.
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post #9 of 33 (permalink) Old 09-15-2018, 04:31 PM
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Lots of great info. I've also found a few corroded connectors of the last few years on the SP2. Definitely check out the ignition wiring and connectors on the bike as mentioned, especially when you have it apart doing anything else (many are on the left side of the SP2). Recently I found another corroded connector I mentioned in my winter refresh thread on the left side inside the twin spar and beside/below the airbox; I was hooking up the PCV and the crank position sensor. I have dielectric grease around just for this bike.

Last edited by kwtoxman; 09-15-2018 at 06:18 PM.
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post #10 of 33 (permalink) Old 09-15-2018, 09:01 PM
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Dennis Kirk has a reg/rec for $152


Is this the best price around?
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