The Starter is made up of components including this Kick Crank Assy which is the most expensive.
Some items from this specific schematic: Gear, Kick Idle, Kick Crank Assy, Washer, Plate (j18), Washer, Plate (25g).
This schematic depicts all components used in the Yz125 1989 (k) Usa Starter partslist.