You'll need to remove the cover.
Slacken off completely the adjustment at both ends of the cable, so the cable is not under any tension.
Loosen the locknut under the clutch cover. Turn the adjusting screw out a turn or two(so it is free), then turn back in clockwise until you can just feel the pressure of it getting tighter. Back it off 1/4 turn, and holding it in position tighten the locknut.
From the clutch cover end, take up the adjustment on the cable until you have about 3/8" to 1/2" freeplay at the lever - meaning you can pull the lever in by that amount before any resistance is felt.
Job done. Use the adjuster at the lever for fine tuning if needed.
Worth checking before you shell out for a new clutch.
