OK so an FB post couldn't throw any light on this issue (Julie seal was helpfull, thank you)
I took thr LH crankcase/sprocket cover off to replace the clutch cable - the clutch was working fine
Obviously a strip, clean & re-grease was required, but I noticed that the clutch adjustment clamp was missing and the clutch adjustor wouldn't move
I eventually removed the adjuster, with a fair bit of force, but it is obviously too big for the hole in the case - the hole is 26mm diameter and the adjuster is 27
Can anyone any light on this and suggest a fix
Also, does anyone have a spare adjuster clamp?
Thanks in advance for any assistance