02-02-2017, 08:20 AM
Testing the battery with a standard voltmeter as a pre-ride check is something I wouldn't do on a regular basis since it's a pain to remove the seat and expose the battery. Popgun put me on to an [url=https://www.amazon.com/Battery-Tender-081-0157-Disconnect-Voltage/dp/B00DJ5KE9A]nifty little digital voltmeter that plugs into a battery tender lead. Since it's much more convenient, I'm going to do a pre-ride check based on [url=http://www.yuasabatteries.com/faqs.php?action=1&id=30]recommendations from yuasa
Plug in the voltmeter and it should read 12.6-12.8 volts for a fully charged battery.
Turn on the ignition and press the starter. While the engine is cranking, the voltage should not drop below 9.5 volts. If it does, replace the battery.
While the engine is running, the voltage should be in the range of 13.8-14.5 volts to properly charge an AGM battery. This is a bit fuzzy to me since I would expect the voltage to be rpm dependent.
Plug in the voltmeter and it should read 12.6-12.8 volts for a fully charged battery.
Turn on the ignition and press the starter. While the engine is cranking, the voltage should not drop below 9.5 volts. If it does, replace the battery.
While the engine is running, the voltage should be in the range of 13.8-14.5 volts to properly charge an AGM battery. This is a bit fuzzy to me since I would expect the voltage to be rpm dependent.