With a quantity of two pieces, the Bearing(25x33x30) is the most used part in the REAR SWINGING ARM (MODEL L) diagram.
The most reasonably priced component used on the Gsxr1100 1990 (l) (e01 E02 E04 15 16 17 18 21 22 24 25 34 39 53) Rear Swinging Arm (model L) is the Bolt 6x20,with Plain Washer.
Of all the components used in this assembly the Swing Arm Assembly,rear is the most expensive.