2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 272Get this manual
CHECKING THE BULBS AND BULB SOCKETS WARNING
Since the headlight bulb gets extremely hot, keep flammable products and your hands away from the bulb until it has cooled down
CAUTION:
Be sure to hold the socket firmly when removing the bulbNever pull the lead, otherwise it may be pulled out of the terminal in the coupler Avoid touching the glass part of the headlight bulb to keep it free from oil, otherwise the transparency of the glass, the life of the bulb, and the luminous flux will be adversely affectedIf the headlight bulb gets soiled, thoroughly clean it with cloth moistened with alcohol or lacquer thinner2Check: bulb (for continuity) (with the pocket tester) No continuityReplacePocket tester 90890-03112, YU-03112-C