Honda Motorcycle Fuel Valve Petcock - 16 x 1.5mm - CB350K CL350K CB400T CM400 CB500T CX500 CB550 CB750 Threading: 16 x 1.5mm 22mm hex nut Ribbed fuel outlet perfect size for use with either 3/16" or 1/4" fuel line. Replaces Honda part number: 16950-393-015 Check fitment list below