Starting a motorcycle with a significantly depleted battery voltage, such as 9.5 volts, can be challenging. The 12-volt electrical system of most motorcycles requires a certain minimum voltage to operate properly. However, it's still possible that your motorcycle may start, albeit with some difficulty, with a 9.5-volt battery.
Here are a few steps you can take:
Charge the battery: Use an appropriate battery charger to replenish the charge in your motorcycle battery. It's best to follow the manufacturer's instructions for charging. Ensure you use a charger suitable for motorcycle batteries and connect it correctly.
Check the battery voltage: Once the battery is fully charged, measure its voltage again. A healthy 12-volt battery should read around 12.6 to 12.8 volts when fully charged. If it still reads significantly lower than that, it might be a sign of a weak or damaged battery that may need replacement.
Attempt to start the motorcycle: With the charged battery installed, attempt to start the motorcycle. Turn the ignition key, engage the starter button, and observe if the engine cranks. If the voltage is near the minimum threshold, you may hear the starter motor struggling to turn the engine over, or it may not turn at all.
Assess the starting process: If the motorcycle fails to start or exhibits signs of weak cranking, such as slow rotation or clicking noises, it's likely that the battery voltage is still too low to provide sufficient power. In such cases, it may be necessary to replace the battery with a new one that is fully charged.
Remember, even if the motorcycle starts with a depleted battery, it's crucial to ensure the battery is fully charged to maintain proper functioning of the electrical system and avoid potential issues while riding. If you encounter persistent starting problems or notice any irregularities, it's recommended to consult a professional mechanic for further assistance.