With a quantity of two pieces, the Washer,a.spline is the most used part in the TRANSMISSION diagram.
The Transmission is made up of components including this M/shaft Trans. which is the most expensive.
Parts such as the Transmission: Collar,22mm, Oil Seal,20x36x7, Gear,m/shaft 6th., Gear,m/shaft 2nd. are included in the Xr250r 1984 (e) European Direct Sales Transmission parts fiche.