I've lost drive to the drum. Appears the clutch cork is worn out and oily. I'm not sure if I can buy a replacement cork or if I need to manufacture one myself. Have attached photos. Also how do I remove the clutch plate. I have slightly pulled it out but then I expose a ring of uncontaminated ball bearings. Or do I undo the Centre nut and extract it as a whole trying to keep it all contained which I don't think will work as I have to remove the old cork.

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