twenty-eight components are listed in the schematic for this Cb400nc 1983 (d) European Direct Sales Seat .
Some items from this specific schematic: Cowl,set*r-107c-u, Cowl *pb-115c-u*, Nut,flange,6mm, Mark,seat Cowl.
The lowest price component in this Seat parts-list fiche is the Screw,tapping,5x16.