These kits include all necessary diaphragms, gaskets and hardware required to disassemble and rebuild the carburetor and external fuel pump using Keihin carbs38/40/42/44mm CDK-II (Aftermarket kit)THESE CARB KITS WILL ONLY WORK ON KEIHIN CDK II TYPESTHESE KITS WILL NOT WORK ON KAWASAKI STX 900 WITH CDCV CARBS