This is the hard to find petcock base gasket for 70's, 80's Yamaha motorcycles. It goes between the petcock base and the tank. It is equivalent to Yamaha Part #2G2-24512-00-00. After years, this gasket becomes flat and no longer provides a adequate seal, so when you remove your petcock, you should replace this gasket. This seal is round (O-Ring), but it forms into the groove of your petcock base.

Some applications include:
XS400 1978-1982(SJ Only, Not J or RJ or Maxim)
XS650 1978-1983
XS750 1978-1979
XS850 1980-1981
XJ650 (LJ) 1982-1983
XJ900 SECA 1983
FJ1100 1984-1985
FJ1200 1986-1987
XJ700 MAXIM 1985-1986
SRX250 1987
XC180 1983
XC200 1987
RIVA 180 1984-1985
RIVA 200 1987-1991

PLEASE READ AND UNDERSTAND DETAILS AND PAYMENT/SHIPPING TERMS BEFORE BUYING. THANKS.