Thanks Russ for the correction. Yes, the L20B clutch is adjusted differently than the 1200 clutch.

To check the play, use your pinky finger to press the pedal. There should be at least 20mm before the pedal gets hard. If there is no play, it can allow the clutch to slip while driving.

For both L20B and 1200 hydraulic clutch, the master cylinder pushrod length must be adjusted for a specified mm of play. Too little play can cause a sticky clutch. For the 1200 clutch master the pushrod is adjusted using shims, I believe it is 1mm at the master.

After you adjust the initial pedal free play at the master cyl push rod to give aprox 1mm free play between the pedal rod and the master cyl piston, then adjust the slave cyl rod to give free play between the throw out and the pressure plate fingers which results in aprox 20mm play at the pedal.