The component with the lowest price in the CRANK - PISTON schematic is the Washer, Plate(6g8).
This schematic depicts all components used in the Ft9.9xk Ft9.9elk Ft9.9exk 1985 Crank - Piston partslist.
Some items from this specific schematic: Piston (std), Washer, Plate(6g8), Bolt, Conncting Rod, Oil Seal (6g8).