In this schematic the "Seat Cushion" is used most often.
The Nut, Flange (7g0) is the lowest priced item on this Sillin schematic.
Parts such as the Sillin: Bracket, Seat, 95701-05100, Lever, Seat, Stopper are included in the Tzr125 1991 3pe2 Spain 213pe-352s1 Sillin parts fiche.