Some items from this specific schematic: Retainer,cl Push Rod Oil Seal, Piece,clutch Push, Plate,clutch Driven(t:1.6) (nas), Gear Assy,primary(nt:71).
The most reasonably priced component used on the Vl800z Volusia 2001 (k1) Usa (e03) Clutch is the Nut.
The Clutch assembly is constructed from several parts from which the Gear Assy,primary(nt:71) is the most expensive.