What voltage should a healthy motorcycle battery read?
Open circuit voltage for a fully, 100% charged AGM battery is 12.8 to 13.0 Volts. AGM batteries that are 75% to 100% charged will measure 12.5 to 12.8 volts. Conventional batteries have slightly lower open circuit Voltages: 12.6 volts (12.8 volts with Sulfate Stop) for 100% charge and 12.4 for 75% charge.
Will a motorcycle stay running if you disconnect the battery?
The answer is yes you can keep the motorcycle running if you remove the battery after you get it started. The battery is what is used to get the vehicle started and the alternator (or the stator for the motorcycle) is what keeps the vehicle running.
What should the voltage be on a motorcycle battery?
Hook up your DVOM in the same manner you did for the standing voltage test, and have an assistant thumb the starter. While the starter is spinning, observe the voltage. The starter should be running at normal speed. A good battery should not drop below 9.6 volts over 10 seconds or so.
How can I tell if my motorcycle battery is overcharging?
A good way to tell if this is happening is to check the battery cables for excessive heat. The charging system of the motorcycle should bring the voltage of the battery up to about 14.2 to 14.8 volts. Anything over that and the system is overcharging. Anything under and the charging system is not able to keep up.
Why does my motorcycle battery drop when I turn it over?
If the battery only measures to a maximum of 10.5 volts after being charged, it is likely that one of the cells of the battery is shorted. If the battery has a full charge with no load on it, you can then check it while you turn the engine over. A battery may fully charge, but then drop significantly when under load.
What should I do if my motorcycle battery is draining?
If the stator doesn’t provide enough power, the battery will begin to drain. For troubleshooting, the stator connector that runs to the engine m ust be unplugged. With the connector unplugged, you can test the stator for both resistance and voltage.