Some items from this specific schematic: Key Set, Relay Comp Ap Win, Blank Key, Cap Assy,noise Su.
The most reasonably priced component used on the Pk50m Wallaroo 1990 (l) Italy / Sel Wire Harness/ Ignition Coil is the Nut,flange,6mm.
On this parts fiche the Bolt Flang 6x12 is the most specified component.