YOST AIR/FUEL MIXTURE SCREW KIT FOR KEIHIN CV

The air/fuel mixture screw is normally plugged off at the factory to prevent for tampering. You won't even find it in a Harley parts catalog. These ones fit the Keihin CV carburetor on all Sportster 1988-2006, all Evolution Big Twin 1990-1999, Twin Cam 1999-2006 and Buell 1992-2006. Come complete with o-ring, spring, washer and thumb screw for easy adjustment.