Hi Tom, I tried stiffer springs this worked to a degree but made operating the clutch lever impossible, I use ATF F, not going to worry about Barnett discs as others have tried them and they haven't worked.
Thanks Adrian, I have been in touch with Bob, you save $100 by dealing with him direct which is good.
Andreas the clutch sprocket on simple observation looks very similar. What are the various methods for changing the hub?
Regards Charles