Hi everyone ,Just to let you know for the record the rough feeling clutch operation has been cured by spraying silicone oil down the clutch cable with an extension tube like you find on a can of wd 40.I had to push a fine ended srewdriver between the cable and the rubber grommet to allow entry of the tube into cable then just sprayed away i also sprayed around the lever bushing on the gearbox and the right angle joint at the rear of cylinder head.But spraying up the cable was the one that made the difference.
Best regards Bob