The lowest price component in this Upper Casing parts-list fiche is the Ybs67-8 Washer, Spring.
Parts such as the Upper Casing: Seal 1, Casing, Upper, Damper, Muffler, Gasket, Upper Casing (nas) are included in the P60tht 1995 Upper Casing parts fiche.
This schematic depicts all components used in the P60tht 1995 Upper Casing partslist.