still battery problems - Honda RC51 Forum : RC51 Motorcycle Forums
 
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post #1 of 9 (permalink) Old 05-16-2012, 09:51 PM Thread Starter
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still battery problems

so after checking the stator,buying a new voltage regulator and a new shinora battery the battery still will not charge... could the ecu box be bad??? what do i need to try next its getting power from the stator to the regulator but nothing to the battery. im stumped need help before i buy a ecu or new computer.bike runs great though
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post #2 of 9 (permalink) Old 05-16-2012, 10:18 PM
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What were your readings on the stator coils?
When each coil checked to ground, did they all show open?
And did you do the current leakage test to check if you had a short?

And since all this was replaced, what sort of voltage reading are you getting at the battery posts with the engine running?
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post #3 of 9 (permalink) Old 05-17-2012, 03:02 AM
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Did you follow the service manual testing procedures? I thought I read somewhere on this site where they talked about the OEM Honda RC rectifier does not charge under a specific RPM (like at idle).

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post #4 of 9 (permalink) Old 05-17-2012, 06:31 AM
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Quote:
Originally Posted by Waldo View Post
Did you follow the service manual testing procedures? I thought I read somewhere on this site where they talked about the OEM Honda RC rectifier does not charge under a specific RPM (like at idle).
You're correct.
The charging voltage is measured with the high beam on, and the engine at 5000 RPM.
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post #5 of 9 (permalink) Old 05-18-2012, 03:21 PM Thread Starter
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This is just what I was told by a mechanic shop. I have not tried anything myself
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post #6 of 9 (permalink) Old 05-18-2012, 03:54 PM
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Don't let the Shorai battery (or any like it) discharge below 11V for an appreciable amount of time.
If the battery is drained below 11V, put it on a battery tender and allow it to recover back to fully charged state.
If the battery is drained below 11V and allowed stay that way, it may not ever recover.
And never let the battery fully discharge as that will chemically alter the battery permanently.
For troubleshooting, it may be best to use a lead-acid battery until your problems are found and fixed, then put it back on the Shorai.
Also, if you Shorai (or other lithium) are sitting on the shelf, periodically check the charge state, and if it's dropping down below 12V, put it on a battery tender until fully charged, then remove. Don't leave the battery in maintenance mode on the battery tender.
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post #7 of 9 (permalink) Old 05-18-2012, 04:46 PM Thread Starter
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Thanks for the helP again
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post #8 of 9 (permalink) Old 05-18-2012, 07:40 PM
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As an FYI, my Shorai battery has been sitting in a box for a year now.
I checked by battery charge state back in March and again today.
It has only lost .01V in two months time. Currently at 13.33V.
So these batteries keep a charge for a very long time.
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post #9 of 9 (permalink) Old 05-18-2012, 07:46 PM Thread Starter
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Thanks again I have charged it up and took it off and it is stored in the box in my house.
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