A good battery will give you more than 12.5V readings. If you have a multimeter, please set the knob to 20V DC and connect the red wire to the positive and the black wire to the battery’s negative terminal. Now, let’s understand how to test and identify a faulty motorcycle battery… 1. I hope you understood a lot about the symptoms of a bad battery. How To Identify A Faulty Motorcycle Battery? If you notice any of the above symptoms, test your battery and replace it immediately. So, these are some common signs of a faulty motorcycle battery. So, better you should install a new battery for hassle-free rides. An older battery will create many problems. The average life of an AGM battery is three to four years. A motorcycle battery refuses to charge because of sulfation or aging.ĭo you remember when you replaced the battery last time? If you can’t recall, it’s an obvious indication that you need a new battery. Battery Charging ProblemĪ faulty battery creates problems in charging (there are several more reasons also). If the multimeter reading is below 12V, you must replace the battery for hassle-free rides. You should read the voltage with a multimeter, which should be above 12V. So, if your motorcycle battery drains overnight, it’s a sign of a battery-related issue. Battery Draining OvernightĪ faulty battery will not hold a charge for too long. If the horn volume is lesser than it used to or generated distorted sound, it’s a sign of a failing battery, and you should immediately replace it. Dim or Flickering HeadlightĬredit: Another easy method to identify a bad motorcycle is pressing the horn switch. If cranking is still taking longer, it’s a strong sign of a bad motorcycle battery, and you should replace it for a hassle-free riding experience. To ensure this, jumpstart your motorcycle and idle it for 15 to 30 minutes to recharge your battery. However, if your motorcycle sits too long, it could be another reason for slow cranking or starting problem. It happens because the battery doesn’t supply constant power to the starter. If you notice that the engine cranks slowly, takes multiple attempts to start, or doesn’t start at all, it could indicate a faulty battery. So, the first symptom of a bad motorcycle battery is that your engine will not start when you press the start button. Your motorcycle will not start without a battery or if it’s faulty. It also powers the starter motor for initial engine cranking. It takes power from a battery installed underneath your motorcycle seat. Motorcycle Will Not StartĪs I told you earlier, modern motorcycles have fuel injectors and ECU that require electricity. These symptoms will help you identify and address battery-related issues. We will explore six common symptoms that indicate a bad battery on a motorcycle. I believe in “ prevention is better than cure.” So, instead of struggling on a ride, I’ll prefer to identify the bad battery symptoms and fix them before going on a ride. 5 Can a Motorcycle Battery Show Full Charge and Still Be Bad?.4 Will a Weak Battery Keep a Motorcycle from Starting?.3 How Does a Bad Battery Affect a Motorcycle?.2 How To Identify A Faulty Motorcycle Battery?.You’ll also notice corrosion on terminals, crack or bulge in the plastic casing, and any leaking fluid or discoloration. So, what are the symptoms of bad battery on a motorcycle? If the battery has gone bad, your motorcycle will not start, the starter will take longer to crank the engine, the headlight and horn will not work at full potential, the battery will not hold a charge, the battery will deform its shape, and give irregular multimeter readings. If you’re a motorcycle enthusiast, don’t skip this article. I’ve explained some common symptoms of a bad motorcycle battery in this guide. ![]() ![]() ![]() ![]() But how to tell if your motorcycle battery has gone bad or just discharged? A dead battery will not start the motorcycle engine. In short, modern motorcycles can’t run without a battery. Still, a battery is necessary to run the starter for initial cranking and power the ECU (on fuel-injected bikes). Motorcycles have a stator that generates electricity to power the ignition system and other electrical accessories when the engine runs.
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