Some items from this specific schematic: Seat Comp.,double, Cowl S*pb-161c-u*, Cover B,rr.grip, Pipe Rr Grip.
Of all the components used in this assembly the Seat Comp.,double is the most expensive.
The most reasonably priced component used on the Cbr600f Hurricane 1987 (h) England / Mkh Seat/seat Cowl is the Screw,tapping,4x1.