The Bolt-upset-wp-small is the most widely applied product in the ZX550A1 GPZ550 1984 EUROPE UK FR GR IT FG SD ST HEADLIGHT(S) ( two times ).
Some items from this specific schematic: Washer-spring,5mm, Screw,focus Adjusting, Lamp-head, Washer.
The most reasonably priced component used on the Zx550a1 Gpz550 1984 Europe Uk Fr Gr It Fg Sd St Headlight(s) is the Bolt,6x14.