With a quantity of four pieces, the Cushion,seat(40x20x15) is the most used part in the SEAT (VL800C E3) diagram.
A sample from the products for the Seat (vl800c E3) include: Cushion(11.5x22x20), Cushion,seat Bracket, Bolt(6x18), Bracket,pillion Seat.
The most expensive part in this assembly is the Seat Assy.