On this parts fiche the Plate-friction,no.1 (nas) is the most specified component.
Parts such as the Clutch(a1/a2): Bearing-needle,cam Sh, Hub-clutch, Washer,10x20x1.0, Washer,clutch are included in the Ksf400-a1 Kfx400 2003 Usa Clutch(a1/a2) parts fiche.
Of all the components used in this assembly the Housing-comp-clutch is the most expensive.