Parts such as the Oil Cooler: Bolt, Bolt, Washer,lock,8., Cushion are included in the Gsx550ef 1985 (f) (e01 E02 E04 E06 E17 E18 E21 E22 E24 E25 E34) Oil Cooler parts fiche.
With a quantity of four pieces, the Washer,lock is the most used part in the OIL COOLER diagram.