It depends on the specific make and model of the motorcycle. Older motorcycles, especially those with air-cooled engines, typically do not use coolant. Instead, they rely on air-cooling to dissipate heat from the engine. These motorcycles typically have fins on the engine cylinders and rely on airflow generated while riding to cool the engine.
Liquid-cooled engines use a cooling system with a radiator, coolant reservoir, and water pump to regulate the engine temperature. This system circulates coolant through the engine and radiator to dissipate heat.
If you have an older motorcycle, it is best to consult the owner's manual or contact the manufacturer to determine whether your specific model requires coolant or relies on air-cooling. Additionally, if you are unsure about the cooling system of your motorcycle or need to perform maintenance, it is recommended to seek advice from a qualified mechanic or service center familiar with your motorcycle's make and model.