Of all the components used in this assembly the Unit is the most expensive.
Parts such as the Headlamp (e17, E18, E21, E22): Socket, Bulb (6v,4w), Spring, Rim are included in the Gp125u 1978 (c) (e01 E02 E04 E06 E13 E14 E17 E18 E21 E22 E24 E32 Headlamp (e17, E18, E21, E22) parts fiche.