On this parts fiche the Cushion,side Cover Boss is the most specified component.
The lowest price component in this Frame Cover (model K) parts-list fiche is the Screw 6x12.
eighteen components are listed in the schematic for this Dr600r 1986 (g) (e02 E04 E16 E18 E21 E22 E24 E25 E34) Frame Cover (model K) .