The Seat assembly is constructed from several parts from which the Main,switch+seat Lock Ass is the most expensive.
A sample from the products for the Seat include: Clip, Main,switch+seat Lock Ass, Cover, Seat, Nut, Spring.
The fifteen Ew50 Slider 2002 5jh5 Spain 125jh-300e1 Seat component parts are all listed in this schematic.