Stil got battery issues! - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 18 (permalink) Old 10-17-2012, 01:33 PM Thread Starter
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Stil got battery issues!

Got new battery , volt regulator, stator was said to be good and bought a computer for it. Still no charge. Sitting not running battery test 12. Vts running dropped to 10 please help before I sell
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post #2 of 18 (permalink) Old 10-17-2012, 01:58 PM
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Do you have voltage on the 3 yellow wires to the regulator with the bike running? Should be seeing about 6.5 volts.


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post #3 of 18 (permalink) Old 10-17-2012, 02:17 PM Thread Starter
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no that was from top f battery post
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post #4 of 18 (permalink) Old 10-17-2012, 03:41 PM
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Measure the volts on the yellow wires. If your not getting 6 to 6.5 volts i would start questioning the stator. How did you figure the stator was good?


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post #5 of 18 (permalink) Old 10-17-2012, 07:26 PM
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Originally Posted by Twin500ccs View Post
Do you have voltage on the 3 yellow wires to the regulator with the bike running? Should be seeing about 6.5 volts.


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I don't think this is right.
The three yellow wires are AC voltage, and there's enough voltage to really get your attention if you mishandle them in any way, which can be dangerous for you and/or your bike's electrical system.

The Honda Service Manual gives the following instructions for checking the stator.
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post #6 of 18 (permalink) Old 10-18-2012, 12:09 AM
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If you check for resistance with an Ohm meter between either one of the yellow wires and the chassis there should not be any (infinite resistance means stator is OK).
Measure the output voltage between each pair of the yellow wires (3 measurements). At idle you should get 12-15V AC and at 5000rpm more than 40V AC on each pair.
If all the above stand correct you probably need a new regulator/rectifier assy.


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post #7 of 18 (permalink) Old 10-18-2012, 11:27 AM
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If you check for resistance with an Ohm meter between either one of the yellow wires and the chassis there should not be any (infinite resistance means stator is OK).
Measure the output voltage between each pair of the yellow wires (3 measurements). At idle you should get 12-15V AC and at 5000rpm more than 40V AC on each pair.
If all the above stand correct you probably need a new regulator/rectifier assy.
So you need to have your multi-meter set to AC voltage - correct?
And you're saying to test two of the three yellow wires at a time?
That would mean putting the + lead to one yellow wire and the - lead to another yellow wire?
How safe is this procedure?

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post #8 of 18 (permalink) Old 10-18-2012, 12:12 PM
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Very safe.
There aren't any Amps to hurt you. Voltage itself doesn't hurt

Remember the last time you grounded an ignition coil through you?
It shocked you due to it's 10.000V but didn't hurt you cause there are no Amps there

The stator produces a three phase AC in triangle arrangement with no neutral line. This setup is called "triangle".

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Three-phase electrical generation is very common. The simplest case is three separate coils in the generator stator that are physically offset by an angle of 120░ to each other. Three current waveforms are produced that are equal in magnitude and 120░ out of phase to each other.


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post #9 of 18 (permalink) Old 10-18-2012, 02:10 PM
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Ok, thanks for that Makis.
On another forum, where a guy is having trouble with his 954 stator, a member said 65V was a little low. He went on to say should be around 80 - 90V. Does that sound right to you?
He went on to say that cheap multi-meters aren't too accurate measuring AC voltage. What do you think?

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post #10 of 18 (permalink) Old 10-18-2012, 06:22 PM
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Hmm glad someone else chimed in. Ive always tested them the other way with success i guess because 12 volts ac will read 6 volts in the dc scale


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