Parts such as the Rear Swinging Arm: Nut 14mm, Swing Arm Assembly,rear, Spacer,swingingarm Ctr, Spacer,rr Swgarm Pivot are included in the Gs250t 1981 (x) Usa (e03) Rear Swinging Arm parts fiche.
On this parts fiche the Bearing(22x29x30) is the most specified component.
The most expensive part in this assembly is the Swing Arm Assembly,rear.