I bought a brake bleeding kit that I used to bleed my clutch hydraulic system. Just pick the right size adapter to fit on the bleed screw and it will snap on. The adapter is connected to a clear hose wich is connected to a little cup. Open the bleed screw, and push down on the clutch pedal. Fluid and air bubbles flow into the cup, making it easy to see when there are no more air bubbles. Hold the pedal down and close off the bleed screw. Release the clutch pedal. Do this until no more air comes out of the bleed screw. Make sure the reservoir dosen't run too low.