Yamaha XZ550RJ 1982 Owner's Manual page 213

1. Holding screw
Headlight
This motorcycle is equipped with a quartz
bulb headlight. If the headlight bulb burns
out, replace the bulb as follows:
1. Headlight bulb replacement
a. Remove the 2 screws holding the light
unit assembly to the headlight body.
b. Disconnect the lead wires and remove
the light unit assembly.
1. Vis de fixation 1. Tornillo de sujeci6n
c. Turn the bulb holder counterclockwise
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and remove the defective bulb.
d. Slip a new bulb into position and secure
it with the bulb holder.