Kits include all of the necessary components to repair a carburetor. ATV or motorcycle models with multiple carburetors include components to repair all carburetors Kit includes necessary all O-rings, gaskets, jets, needle, mixture screw, float bowl screws, float valve needle and seat. (Needle jet and other pressed in jets are not included in kit). OEM jet sizes and slide needles are included in the kit. FCR MX style carb kits include extended fuel mixture screw. Harley kits contain jetting selection, extended fuel mixture screw, intake gaskets, and manifold gaskets.