Mikuni Carburetor Rebuild Kit For HSR 42 / 45 Features: Genuine Mikuni parts properly replace worn or mistreated components for Hsr42/45 carburetors Includes top cover gasket, jet needle E-ring and washer, throttle valve seal, pilot air O-ring, fuel joint O-ring, accelerator pump O-ring, needle valve O-ring, needle valve retainer screw, needle valve assembly, float bowl O-ring/gasket, overflow hose, float bowl screws, accelerator pump rod boot