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Old 10-10-2011, 06:19 PM   #1
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Default CB550 charging issues

So after many unsuccessful and short riding attempts, I've discovered that my '77 CB550's charging system is an issue. I had a "used" stator put on my "broken one" at my local shop but now my battery won't hold a charge and I just put a new one in not 6 weeks ago!?!?

Is this some sort of regulator or alternator thing or just a defunct battery?

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Old 10-10-2011, 07:54 PM   #2
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Originally Posted by dietzzd View Post
Is this some sort of regulator or alternator thing or just a defunct battery?
If the battery really won't hold a charge, then the battery is bad.

If you measure the voltage at the battery and run the bike from idle to about 3-4K RPMs and the voltage never goes above 12.5 or so.......then your charging system is still bad. It is fairly easy to test a stator and if it's good, then the regulator is about all that's left. On a bike that old, the rectifier might be a seperate unit too.

If you have been running your new battery up and down for 6 weeks because the bike isn't charging, then both things could be bad.
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Old 10-10-2011, 09:58 PM   #3
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To end the recurring-problem of the weak-ass Honda Reg/Rec and it's propensity to "break" the stator when it dies, google "Eastern Beaver" and "Switchmode-Rectifier" or something like that.
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