Remove the front seat (page 2-4).Remove the reserve tank cap [1] and add the coolant to the "UPPER" level line.Reinstall the cap.Check to see if there are any coolant leaks when the coolant level decreases very rapidly.If the reserve tank becomes completely empty, there is a possibility of air getting into the cooling system.Be sure to remove any air from the cooling system (page 8-5).Install the front seat (page 2-4).