The Gs400 1978 (c) (e01 E02 E04 E17 E18 E21 E22 E24 E25 E30 E34 E39) Chain Case-shock Absorber consists of twelve pieces with the Absorber Assembly,rear Shock being the most expensive.
Parts such as the Chain Case-shock Absorber: Bolt, Bolt(6x8), Washer(6.5x18x1), Absorber Assembly,rear Shock are included in the Gs400 1978 (c) (e01 E02 E04 E17 E18 E21 E22 E24 E25 E30 E34 E39) Chain Case-shock Absorber parts fiche.
In this schematic the "Nut, Lower Lh" is used most often.