Some items from this specific schematic: Seat Comp., Rubber,rr.stopper, Collar,seat Stay, Cowl *r-107c-u*.
The Cb900f 1980 (a) F9- Seat consists of nineteen pieces with the Seat Comp. being the most expensive.
The lowest price component in this F9- Seat parts-list fiche is the Screw,tap.,5x8.