With a quantity of two pieces, the Bearing(20x27x20) is the most used part in the REAR SWINGING ARM diagram.
Parts such as the Rear Swinging Arm: Washer, Nut 14mm, Bolt(8x22.5), Swingingarm Assy,rr are included in the Gn250 1990 (l) Australia (e24) Rear Swinging Arm parts fiche.
The Pin 20x20 is the cheapest item from this partsfiche.