KiWAV motorcycle idle mixture screw Carburetor Carb for Harley-Davidson 90-06 CV Carburetor CVK 34-36 Keihin carburetors Easily tune and adjust your idle mixture without burning your hands or fumbling with a small screw driver. For Harley-Davidson 90-06 CV Carburetor Fitted with CVK 34-36 Keihin carburetors 3 PCS (Special spring x 1, O-ring x 1, Washer x 1) Please use your stock washer and spring if the diameter of attached washer and spring were too large. Please see the measurement and compare it with your original screw before buy it.