The term "9 volt" refers to the voltage rating of a motorcycle battery. A 9-volt battery implies that the battery is designed to provide a nominal voltage of 9 volts when it is fully charged.
Most motorcycles typically use batteries with 12 volts as the standard voltage rating. A 12-volt battery is the most common type of battery used in motorcycles and many other vehicles.
The 12-volt rating is based on the electrical system of motorcycles, which is designed to operate with a 12-volt power supply. This voltage is necessary to power the motorcycle's ignition system, lights, and other electrical components.
If you encounter a motorcycle battery labeled as 9 volts, it could be a specialized battery designed for a specific purpose or a non-standard battery for a particular motorcycle model. In such cases, it's crucial to refer to the manufacturer's specifications and guidelines to ensure compatibility and proper usage.
It's worth noting that motorcycle batteries, like any other battery, have a nominal voltage, which may vary slightly depending on the battery's state of charge and other factors.