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mrlmd1 · 03-29-2012, 10:53 PM

You have to check the voltage at least a half hour to an hour or more AFTER you disconnect the charger, in order to let the "surface charge"dissipate. Checking it immediately after disconnecting the charger would give you an inaccurate reading of battery voltage.
With the bike running at at least 2500-3500 rpm, measure the voltage at the battery terminals. If your charging system is functioning normally and the battery is OK, you should get a reading between 13.5-14.5 volts. If the battery voltage before you start is normal and the charging voltage is normal, then you lucked out and you won't need a new battery. Just make sure you ride it for a half hour or more once a week at least.
Like I said before and you better listen - do not start the bike and let it idle for a few minutes because you are depleting more energy out of the battery to start it than you are replacing into it at idle. You will only be able to do that a few times before the battery does not have enough capacity to start the bike and then you're in the same place as the start of this thread, but maybe you won't be able to resurrect the battery next time.

03-29-2012, 10:53 PM	#8
mrlmd1 Senior Member Join Date: Jan 2008 Location: Crawfordville, Florida Posts: 2,853	Re: Battery Charging You have to check the voltage at least a half hour to an hour or more AFTER you disconnect the charger, in order to let the "surface charge"dissipate. Checking it immediately after disconnecting the charger would give you an inaccurate reading of battery voltage. With the bike running at at least 2500-3500 rpm, measure the voltage at the battery terminals. If your charging system is functioning normally and the battery is OK, you should get a reading between 13.5-14.5 volts. If the battery voltage before you start is normal and the charging voltage is normal, then you lucked out and you won't need a new battery. Just make sure you ride it for a half hour or more once a week at least. Like I said before and you better listen - do not start the bike and let it idle for a few minutes because you are depleting more energy out of the battery to start it than you are replacing into it at idle. You will only be able to do that a few times before the battery does not have enough capacity to start the bike and then you're in the same place as the start of this thread, but maybe you won't be able to resurrect the battery next time.
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