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Old 05-19-2010, 04:05 PM   #1
CBRBuron
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Diagnose charging system

I just got a new battery, the old one was dead. I also just got a reg/rec and replaced it. I did the volt reading with the old reg on and got 13.3 , and with it off I got 12. New reg on I get 12, so I think my old one was busted. Hopefully that is it, but if it is not, anyone know what is next to check? Maybe the diodes on the plug and the stator. And how hard this is, any advice would be fantastic.

2000 Honda CBR600

Or how much would cost to have a shop diagnose it. Thanks guys
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Old 05-19-2010, 04:27 PM   #2
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What is it at 1500rpm + ? that's when a bike will be charging.

A good battery SOC would be 12.7v... anything lower the battery is being drained.

So charging needs to be above that number.



If the charging system checks out good, look into a parasitic draw that is discharging the battery while the vehicle is off and not allowing restarts. If the bike can run forever but overnight cannot restart, that shows a battery/ parasitic draw issue not charging.
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Old 05-19-2010, 05:35 PM   #3
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I will check it tonight, the battery was showing 12.9 when not being used, but Ill check tonight. Plus I was riding yesterday, and it was fine, no dying nothing, but when it sits and idles for like 5 minutes it sounds like it is going to cut out, and it did 2 times but I dont know if it was me or the bike.
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Old 05-19-2010, 05:37 PM   #4
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what is it idling at?

At every weather change the idle usually needs to be adjusted back to 1125-1350 +-50rpm depending on model. Your bike's correct spec will be on the emission label.
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Old 05-19-2010, 07:04 PM   #5
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around 1500 rpm idle
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Old 05-19-2010, 10:11 PM   #6
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12.7 when not in use, 13.1 when idle at 1500 and 13.7 when rev at 4000
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