The component with the lowest price in the TRANSMISSION schematic is the Screw Pan Head.
A sample from the products for the Transmission include: Oil Seal (20x38x5-517), Gear, 5th Pinion, Sprocket,drive 16t(34y1746161), Plate, Cover.
twenty-nine components are shown in this Tzr125 1992 4cl2 Europe 223pb-300e1 Transmission exploded diagram.