Parts such as the Front Wheel: Camshaft, Brg,r-b 6200 30mm 32g Ky, Hub, Front, Brg,r-b 6200 30mm 32g Ky are included in the Qt50 L 1984/1985 Usa Front Wheel parts fiche.
On this parts fiche the Brake Shoe Set (asbestos) (mca) is the most specified component.
Check out any of the thirty-two Front Wheel components enlisted.