On this parts fiche the Oil Seal is the most specified component.
Parts such as the Rear Swinging Arm (model F): Bolt(10x22), Label (front Carrier Warning), Shaft,rr Swingingarm Pivot, Nut are included in the Lt250r Quad Racer 1990 (l) Usa (e03) Quadracer Quad-racer Rear Swinging Arm (model F) parts fiche.