Rick,

If you look at the front of than on clutch lever side you will see a white bottle near the headstock under the ignition key, thats water \ coolant bottle, on the side of the bottle are minimum and maximum markers for the levels.

The lid is on the top but a bit obscured by the tank and if it hasnt been opened for a while you may need to lift the tank out of the way to get a proper grip ...

If I can do it .. anyone can ...

Hope that helps mate ...