1998-2001 Yamaha YFM600FHM Grizzly Factory Service Manual, Page 139Get this manual
IIANOSJP I(0) HEADLIGHT BULB REPLACEMENT 5.lnstall: Bulb (new) Secure the new bulb with the headlight unit
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Avoid touching the glass part of the bulbKeep it free from oil; otherwise, the transparency of the glass, life of the bulb, and luminous flux will be adversely affectedIf oil gets on the bulb, thoroughly clean it with cloth moistened with alcohol or lacquer thinner