The lowest price component in this Valve parts-list fiche is the Seat, Valve Spring 2.
This Arm, Valve Rocker is the most expensive of the items that make up this Valve assembly.
Parts such as the Valve: Arm, Valve Rocker, Valve, Exhaust, Seat, Valve Spring 2, Nut (22f) are included in the Mt125-a 2018 Br36 Europe Mt-125 Abs 1tbr3-300e1 Valve parts fiche.