![]() Start your motor and bring the RPM's up to approximately 3,000. Next, you'll want to determine if your charging system is working and properly feeding your battery when the motorcycle is running. CHECK OUT OUR AWESOME BIKER TUTORIAL VIDEOS If it drops below the 9.6v, the battery has a very low capacity and should be replaced. Good readings will be above 10v, 9.6v being the absolute lowest you'd want to see. ![]() (positive to positive and negative to negative). Place the voltmeter leads to the battery terminals. Next, you'll need to determine the cold cranking power that your battery is capable of. Starting Battery Load Test: (cold cranking test) If it reads below those values then your battery is not keeping a full charge.Ĭheck out the Official Law Abiding Biker Store! A good battery should read between 12.4 to 12.6 volts, 12.6v being optimal. This is to get rid of any surface charge. Turn on your ignition so your headlights are on and other accessories for about two minutes and then turn the ignition off. Let it sit for at least an hour after disconnecting it from a charger. Make certain you have not recently charged your motorcycle battery. LAB-134-Harley-Davidson Alternators, Stators, Regulators, Rectifiers-Charging System | Complete Guide.Note: These multimeter settings will be used for all the below motorcycle battery and charging system tests.Ī must listen to Law Abiding Biker™ Podcast Episode and Article: Episode #134 (click link below) Many volt meters might only have a 20v setting, which is the one you should choose and will work the same. The particular multimeter listed on this page (left) has an actual 12v setting, making it very easy. Set the multimeter/voltmeter to DC volts (20v range). In this video, we show you how to choose the correct settings on your multimeter & complete all the necessary tests. Your battery may even be holding a charge, but it's the cold cranking amps that may determine if your battery needs replacement. Or you may find it's not the battery at all and a charging system problem instead. Be in the know on whether you actually need a new motorcycle battery or not. No need to go running to a dealership to spend money. We show you how to easily test your motorcycle battery & charging system using a simple inexpensive digital multimeter right in your very own shop or garage. Recommended Digital Multimeter (affiliate link)
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