The most reasonably priced component used on the Cr125r 1990 (l) Usa Cylinder Head - Chart is the Nut,flange,6mm.
Of all the components used in this assembly the Cylinder Comp. is the most expensive.
Parts such as the Cylinder Head - Chart: Seal,exhaust Pipe, Bolt,stud,6x24, O-ring,19x3, Cylinder Comp. are included in the Cr125r 1990 (l) Usa Cylinder Head - Chart parts fiche.