BMW F 800 GS Rider's Manual page 133

Pull glass on screw connection
side out of mirror housing.
Remove the bulb 2 from the
light housing by turning it
counterclockwise.
Replace defective bulb.
Bulbs for flashing turn
indicators, front
R10W / 12 V / 10 W
To prevent contaminants from
being deposited on the new
bulb's glass surface, always use
a clean, dry cloth to hold it.
Install bulb 2 by screwing
clockwise into light housing.
Insert inside end of lens into
light housing and close it.
Fit the screw 1.
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