Reasons Why a Motorcycle Won't Start, the Horn Doesn't Work, and the Headlight Doesn't Light Up?

1 Answers
DelSienna
07/30/25 8:03am
It is likely a battery issue. Check whether the two main battery cables are loose or oxidized, and then check if the battery is severely depleted. The battery uses lead plates filled with sponge-like lead as the negative electrode, lead plates filled with lead dioxide as the positive electrode, and 22–28% dilute sulfuric acid as the electrolyte. During charging, electrical energy is converted into chemical energy, and during discharging, chemical energy is converted back into electrical energy. When the battery discharges, metallic lead acts as the negative electrode, undergoing oxidation and converting into lead sulfate; lead dioxide acts as the positive electrode, undergoing reduction and converting into lead sulfate. When the battery is charged with direct current, lead and lead dioxide are generated at the two electrodes, respectively. After disconnecting the power source, it returns to its pre-discharge state, forming a chemical battery. A lead-acid battery is a rechargeable battery, also known as a secondary battery. Its voltage is 2V, and typically three lead-acid batteries are connected in series to achieve 6V. Automobiles use six lead-acid batteries connected in series to form a 12V battery pack. Ordinary lead-acid batteries require periodic replenishment of distilled water to maintain the electrolyte as 22–28% dilute sulfuric acid after some use.
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