The Frame-side Cover Yz250d assembly is constructed from several parts from which the Cover, Side(r.h)(yellow/black) is the most expensive.
Parts such as the Frame-side Cover Yz250d: Bolt, Flange, Bracket, Rear Under 1, Washer, Wave (583 Chain Protec, Collar are included in the Yz250 Competition 1977 Usa Frame-side Cover Yz250d parts fiche.