F.1 sport clutch

[fogrider]

My sport has been unused for several years as I got sick of the clutch judder. Richard Negus helped me replace the cush rubbers which made a big difference, but it still juddered an annoying amount when setting off. ( it was a favour so I did'nt like tell him it was'nt the full cure he expected !).
The plates have all been checked over on a surface plate and seem to be true.
A Commando owner recently suggested replacing the bronze plates with fibre ones, need advice on that ! Apparently the bronze ones can be troublesome.
Richard suggested leaving a friction plate out, have'nt tried it , not sure if that would stop judder.
Someone I met at Stafford 2 years ago ( from Andover Norton ) suggested replacing the outer ring and circlip as any distortion on them may cause the diaphragm to run off. Seems feasable.
Just gathering all the ideas and suggestions together before I start dismantling - I don't want it to be in bits a long time and I would like to take it to the Norton Gathering at Pocklington in May.
Any and all ideas welcome !

Regards all, Terry.

[James]

My Classic clutch engages in a very small lever movement . I read all the posts about that and the consensus was the diaphragm type spring and the type of lifting mechanism was to blame . Both cannot be changed without much effort. One person said to change the lift mechanism steel ball with one that is larger. My Commandos are just fine, with that type of spring.

[fogrider]

Thanks James,
Maybe the ball is not running true in the lift pin, worth a look at whilst it's apart. I'm wondering if the fingers of the diaphragm are not equal height so giving a bias to the pressure plate ?
Not familiar with diaphragm clutches, my other bikes are all normal springs.