Petcock rebuild kit fits Kawasaki/Yamaha models from the 80's. The kit comes with everything shown in the photo. If you've got an original petcock that can be rebuilt, make sure to clean every passage way thoroughly to let the gas flow freely.
Similar to K&L Part: 18-2698
Fits on Kawasaki Part: 51023-1030 (petcock)
Fits on Yamaha Part: 3AL-24500-00-00 (petcock)
92055-1085(Kawasaki), 3H3-24534-00-00(Yamaha) - O-ring goes between valve lever and gasket.
11009-1188(Kawasaki), 3H3-24523-00-00(Yamaha) - Gasket goes behind the valve lever that turns the fuel on and off.
51039-003(Kawasaki), 2W6-24512-00-00(Yamaha) - O-ring between petcock and tank.
43028-1021(Kawasaki) - Diaphragm valve assembly.

Fits Kawasaki:
KZ440 - 1980-1984
KZ550 - 1980-1983
ZL600 Eliminator - 1986-1987, 1996-1997
KZ650H1 CSR - 1981
KZ750K1 LTD - 1983
KZ750M1 CSR - 1982
Fits Yamaha:
SR250 Exciter - 1980-1982
XS400 Maxim - 1982-1983
XS400R Seca - 1982-1983
XJ550 Maxim - 1981-1983
XJ550R Seca 1981-1983
XZ550R Vision - 1982
FJ600 - 1984-1985
XJ650 Maxim - 1980-1983
XJ650LH Midnight Maxim - 1981
XJ650R Seca - 1982
XV700 Virago - 1984-1987
XJ750R Seca - 1981-1983
XV750 Virago - 1981-1983
XV750MK Midnight Virago - 1983
XV920 Virago - 1982-1983
XV920MK Midnight Virago - 1983
XV920R - 1981-1983