Plate B, Clutch

Competition machinery like these are naturally more likely to wear there Clutch out during the heat of racing. When replacing the friction discs, check that the plates have not become damaged by the metal of the worn out discs, or distorted through heat and pressure. If this is the case, then renewal is perhaps the sensible option.
When ordering, don't forget to include any gaskets and seals that may be required to finish the job off correctly. The online 'parts list' fiche will help in this respect.