The Gsx550ef 1984 (e) (e01 E02 E04 E16 E17 E18 21 22 24 25 26 34 39) Rear Swinging Arm consists of twenty-one pieces with the Swing Arm Assembly,rear being the most expensive.
The twenty-one Gsx550ef 1984 (e) (e01 E02 E04 E16 E17 E18 21 22 24 25 26 34 39) Rear Swinging Arm component parts are all listed in this schematic.
Parts such as the Rear Swinging Arm: Bearing(25x33x30), Case,chain, Washer, Pin 20x20 are included in the Gsx550ef 1984 (e) (e01 E02 E04 E16 E17 E18 21 22 24 25 26 34 39) Rear Swinging Arm parts fiche.