In this schematic the "Stud 8x25" is used most often.
Parts such as the Special Market (e17) (gs400c,ec,n:~f.no.71031) (gs400en:~f: Washer, Tube,fork,left,outer, Spring,rebound, Nut are included in the Gs400e 1979 (n) (e01 E02 E04 E17 E18 E21 E22 E24 E25 E30 E34 E39 Special Market (e17) (gs400c,ec,n:~f.no.71031) (gs400en:~f parts fiche.