The component with the lowest price in the TRANSMISSION schematic is the Circlip.
Parts such as the Transmission: Gear, Primary Driv, Bearing, Brg,r-b 6000 26mm 19g Nt, Gear, 1st Wheel are included in the Yp250r 2006 1c03 France 1e1c0-300e1 Transmission parts fiche.
Of all the components used in this assembly the Axle, Main is the most expensive.