Have you tried adjusting the cable end at the engine end of the cable?
That's what I mean when I say I've done the recommended adjustment. There is no more cable to adjust it's fully tight.
Just to clarify, there is now no cable slack as it has all been taken up at the engine end. When I pull the lever there is no slack at the lever end and the cable pulls immediately. What
doesn't happen is any response from the clutch until the lever is nearly against the handlebar.
To summarise, when I pull the lever I am not pulling slack, the cable responds immediately - it's the clutch that isn't responding to the pull of the cable. I have done the push rod adjustment as well.
Quick thought...when doing the pushrod adjustment, should the clutch cable first be totally loosened off?