Gas Fuel Tank Petcock Valve for Honda Z50 Z50R TL125S CB125S MB5 CT125 Trail Brand new fuel petcock valve Fits Honda Z50R 1979-1999; Honda CT125 Trail 1977; Honda TL125S 1976; Honda CB125S 1978-1981; Honda MB5 1982 Please see description for additional compatible vehicles. Replace OEM Parts #: 16950-147-045; 16950-149-025; 16950-163-035; 16950-gw8-670; 16950-147-025; 16950-147-035; 16950-149-000; 16950-149-005; 16950-149-015 Mounting Nut Diameter: 14 x 1.0 mmNut's inside diameter 12.9mm)