1980-2009 Fits All Sportsters®, FXRS®, FXRS-SP®, FXLR® ,FXRS-CON® - Later FXD® also Pre-2006 DynaGlide® Models Marlin’s fork stem cover thermometer replaces the fork stem bolt cap or covers a fork stem bolt that has no cap. Item comes with thermometer, screw and triple chromed, machined billet aluminum housing. These handsome covers will add style and class to your front end. All units are waterproof, shock resistant and have glow in the dark elements (glowing elements require reasonable exposure to light for activation.) Your fork stem bolt may not have a hole in the center. If this is the case you can purchase the Pre-tapped fork stem replacement bolt from Harley-Davidson Part#4453 or other reputable vendor. You may also drill and tap your own ¼” x 20 hole in the existing bolt.