Lose your oil tank cap? Maybe it cracked or got cross threaded? No problem, we have an exact replacement cap for most Polaris 2 stroke ATV's. Impact resistant plastic construction includes the rubber seal as well. Replaces Polaris part numbers 5430779. NOTE: This cap fits the OIL tank, not the gas tank. Fits the following models: 1993 250 1994 300 1993 350L 1994 400L 1989-92 Big Boss 1991-97 Big Boss 6x6 1986 Scrambler 1995-02 Scrambler 400 1994-99 Sport 400 1993-97 Sportsman 400L 1990-06 Trail Blazer 250 2003 Trail Blazer 400 1986-99 Trail Boss 250/350 2000-02 Xplorer 250 1996-01 Xplorer 300 1995-02 Xplorer 400 1996-99 Xpress 300 1996-97 Xpress 400