For a 1972 Honda XL 250, the recommended battery size is typically a 6N4-2A-4. This battery is a 6-volt, 4 Ah (amp-hour) battery commonly used in vintage motorcycles of that era.
It's important to note that battery requirements can vary depending on the specific year and model of the motorcycle, as well as any modifications or aftermarket accessories that may have been added. Therefore, it's always best to consult the owner's manual or contact a Honda dealership or a reputable motorcycle parts supplier to ensure you get the correct battery size and specifications for your specific bike.
Additionally, it's worth checking the dimensions of the battery compartment on your motorcycle to ensure that the new battery will fit properly. Some older bikes may have specific size limitations or mounting configurations that need to be considered when selecting a battery.
If you're still having difficulty finding the right battery, it may be helpful to reach out to a vintage motorcycle specialist or an online forum/community dedicated to Honda XL series motorcycles. They may have specific recommendations or resources to help you locate the correct battery for your bike.