Not sure how I missed this before, but looking at the photo attached to this post, you will see that the clutch fork is terminally cracked, which I believe is probably causing this issue.
Looking at my model 33, the fork assembly looks identical (albeit with an additional, removable mounting bracket). I think i can swap them out. I will have a try when I find some time.
I suspect this will have caused other problems too (at least the thrust pad - and potentially cone damage as you mentioned). I think from here I should remove the fork assembly and take a closer look, but I guess I'm going to need to whip the engine and clutch off anyway to change the thrust pad, so a more comprehensive assessment can be made when I do that.
I do wonder how/ why the clutxh fork is damaged the way it is. As always your input will be much appreciated!
