The cooling system prevents the engine from overheating by circulating coolant through the engine and radiator, thus maintaining an optimal operating temperature.

The main components of the cooling system include the radiator, radiator fan, water pump, thermostat, coolant reservoir, hoses, and the cooling system pressure tester.

The coolant level should be checked in the reserve tank with the motorcycle held perpendicular. If the level is below the "L" mark, add coolant to the "F" level line.

To drain the coolant, remove the radiator cap, place a container under the drain bolt at the bottom of the water pump cover, and then remove the drain bolt to let the coolant flow out.

To refill the coolant, fill the radiator with the specified coolant mixture up to the filler neck, and also fill the reserve tank to the "F" level line. Ensure to bleed air from the system by running the engine and tapping the radiator hoses.

The coolant should be changed periodically as specified in the maintenance schedule, or if any signs of deterioration, such as discoloration or abnormal smells, are observed.

The thermostat regulates the flow of coolant based on its temperature, helping the engine to warm up quickly and then maintaining the optimal operating temperature.

The radiator should be inspected for obstructions, bent fins, or any damage. If more than 20% of the air passages are blocked or if there is significant damage, the radiator should be replaced.

During pressure testing, do not exceed the maximum design pressure of 123 kPa (1.25 kgf/cm², 18 psi). Check for steady pressure to confirm the system is leak-free.

The water pump should be inspected for coolant leaks, and the impeller should be checked for corrosion or damage. Replace the pump if any issues are found.