Motorcycle Battery Voltage At Idle

You should see the voltage increase on your meter even further up to around to 14 4volts this will vary from bike to bike.

Motorcycle battery voltage at idle.

Measure the battery voltage. It should be between 12 4 and 12 8 volts. If it keeps creeping down the longer it sits order a new battery or look for a parasitic drain in the bike. If lower than 12 4 consider getting a load test done.

Now push the starter button and watch what the voltage drops to. Technically a motorcycle battery does charge while the motorcycle is idling though it does not provide as much amperage as when the motorcycle is at higher speeds. If you ve got one refer to your battery manufacturer s recommendations batteries need both voltage and current but testing voltage is easy all you need is a multimeter also known as a dvom digital volt and ohm meter. Both old alpine amp and new amp are rated at 14 4 input voltage.

It s not a heat issue since new amp shuts down only when voltage increases. A healthy 12 volt motorcycle battery should maintain a range from 9 5 10 5 volts under the load for a good 30 seconds straight. Battery is 12v agm only 1 month old. During a normal ride a motorcycle provides about 13 14 or 15 amps while idling only provides less than 1 amp.

If so this is good. That voltage you measure is the battery s no load reference voltage. Your motorcycle s charging system check is complete. It doesn t matter if the bike starts or not what you re looking for is a voltage reading.

At idle battery is showing 14 2 3 and 14 8 9 when throttled.