The Screw, Rim Adjuster is the most widely applied product in the XT350 1991 3YT1 FRANCE 213YT-351F1 HEADLIGHT ( two times ).
The fifteen Xt350 1991 3yt1 France 213yt-351f1 Headlight component parts are all listed in this schematic.
Some items from this specific schematic: Grommet 839774310000, Holder, Bulb (germany), Rim, Headlight, Screw, Rim Adjuster.