So a bit of investigation and much discussion later resuted in pulling the engine to investigate the clutch issue. I had used a NOS clutch cover, plate and bearing, but to be on the safe side I have now purchased a new boxed set of the 3 components. The clutch plate and cover are completely different in appearance to the NOS items but probably similar in function. The bearing however is a different story. The bearing I originally installed, supposedly the correct item, was 16mm high. The new bearing is 19mm high. I have since put everything back together and refitted the engine and am pleased to say I now have a clutch that works!
nos_vs__new_clutch1 by Robin Martin, on Flickr
nos_vs_new_clutch2 by Robin Martin, on Flickr
clutch_bearing by Robin Martin, on Flickr​



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