Vacuum piston all CV carbs 88-up

We stock most replacement parts for the Keihin CV (Constant Vacuum) carburetor, including the rubber membrane for the throttle slide and a screw to adjust the air/fuel mixture, parts that even Harley-Davidson does not supply. All parts fit the Keihin CV on 1988-2006 Sportster, 1990-2000 Evolution Big Twin and 1999-2006 Twin Cam, unless indicated differently. Note: S&S manifolds must be installed with S&S seals 231154 and 236951 or 236952.