APRILIA RS 50 - 1999 Manual page 86

Carefully read p. 83 (BULBS).
 
WARNING
Do not ride your motorcycle if the tail
light and the stoplight are not working
properly. The stoplight is particularly
important to prevent other motorcycles
from rearending you. Obviously, failure
to comply with these instructions could
lead to a serious accident with subse-
quent injuries or even death.
NOTE
Before changing a bulb, check
the fuse, see p. 80 (CHANGING FUSES),
also check the operation of the stoplight
switches, see p. 75 (CHECKING THE
SWITCHES).
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86 use and maintenance RS 50
Position the motorcycle on the stand.
Unscrew and remove the two screws (1).
Remove the lens (2).
NOTE
Upon reassembly, make sure
that the lens seats properly.
 
CAUTION
Upon reassembly, do not overtighten
the two screws (1). Overtightening will
crack the lens.
To remove the bulb (3), push the bulb
slightly forward and rotate it counter-
clockwise.
Pull it from its seat.
NOTE
Ensure that the orientation of
your replacement bulb is identical to that of
the original bulb. Do not try to force the
bulb, it will fit easily if it is properly oriented.