This cap  & gauge will fit the following models even if your model came with a non gauge cap.The inside width of this cap is 2 1/2", please check yours to be sure it will fit. 

1988 TRAIL BOSS 250

1988 TRAIL BOSS 250 R/ES

1989 BIG BOSS

1989 BIG BOSS 4X6

1989 BIG BOSS 4X6 

1989 TRAIL BOSS 

1989 TRAIL BOSS 2X4

1989 TRAIL BOSS 4X4

1990 BIG BOSS 4X6 

1990 TRAIL BLAZER 

1990 TRAIL BOSS 250 

1990 TRAIL BOSS 2X4 

1990 TRAIL BOSS 350L 2X4 

1990 TRAIL BOSS 350L 4X4 

1990 TRAIL BOSS 4X4 

1991 BIG BOSS 4X6

1991 BIG BOSS 6X6 

1991 TRAIL BLAZER 

1991 TRAIL BOSS 250 

1991 TRAIL BOSS 2X4 

1991 TRAIL BOSS 350L 2X4 

1991 TRAIL BOSS 350L 4X4 

1991 TRAIL BOSS 4X4 

1992 BIG BOSS 4X6 

1992 BIG BOSS 6X6 

1992 EURO BIG BOSS 6X6 

1992 EURO TRAIL BOSS 4X4 

1992 TRAIL BLAZER 

1992 TRAIL BOSS 250 

1992 TRAIL BOSS 2X4

1992 TRAIL BOSS 350L 2X4 

1992 TRAIL BOSS 350L 4X4 

1992 TRAIL BOSS 4X4 

1993 250 2X4 

1993 250 4X4 

1993 250 6X6 

1993 350L 2X4 

1993 350L 4X4 

1993 350L 6X6 

1993 EURO 350L 4X4 

1993 EURO 350L 4X4 

1993 EURO 350L 6X6 

1993 EURO 350L 6X6 

1993 SPORTSMAN 4X4 

1993 TRAIL BLAZER 

1993 TRAIL BOSS 

1994 300 2X4 

1994 300 4X4

1994 300 6X6 

1994 400L 2X4 

1994 400L 4X4 

1994 400L 6X6 

1994 NORWEGIAN 400L 4X4 

1994 NORWEGIAN 400L 6X6 

1994 SPORT 400L 

1994 SPORTSMAN 4X4 

1994 SWEDISH 400L 4X4 

1994 SWEDISH 400L 6X6 

1994 TRAIL BLAZER 

1994 TRAIL BOSS

1995 300 2X4 

1995 300 4X4 

1995 400L 2X4

1995 BIG BOSS 6X6 400L 

1995 SCRAMBLER 4X4 

1995 SPORT 400L 

1995 SPORTSMAN 4X4 

1995 TRAIL BLAZER

1995 TRAIL BOSS 250 

1996 400L 6X6 

1996 NORWEGIAN 400L 6X6 

1996 SCRAMBLER 

1996 SPORT 400L 

1996 SPORTSMAN 4X4 

1996 TRAIL BLAZER ES 

1996 TRAIL BOSS 

1997 BIG BOSS 6X6 400L 

1997 BIG BOSS 6X6 400L 

1997 SCRAMBER 400L 

1997 SPORT 400L 

1997 SPORTSMAN 400L 

1997 TRAIL BLAZER 

1997 TRAIL BOSS 

1998 TRAIL BLAZER 

1998 TRAIL BOSS 
2001 Polaris ATV SCRAMBLER 500 2X4 
2001 Polaris ATV SCRAMBLER 500 4X4 
2002 Polaris ATV SCRAMBLER 500 2X4 
2002 Polaris ATV SCRAMBLER 500 4X4 
2002 Polaris ATV TRAIL BLAZER 
2002 Polaris ATV TRAIL BLAZER FREEDOM 
2003 Polaris ATV SCRAMBLER 500 4X4 
2003 Polaris ATV TRAIL BLAZER 250 
2004 Polaris ATV SCRAMBLER 500 4X4 
2004 Polaris ATV TRAIL BLAZER 
2005 Polaris ATV SCRAMBLER 500 4X4
2005 Polaris ATV TRAIL BLAZER 
2006 Polaris ATV Scrambler 500 4x4 
2006 Polaris ATV Trail Blazer 
2007 Polaris ATV SCRAMBLER 500 2X4
2007 Polaris ATV SCRAMBLER 500 4X4 
2008 Polaris ATV SCRAMBLER 2X4 
2008 Polaris ATV SCRAMBLER 4X4 
2009 Polaris ATV SCRAMBLER 2X4 
2009 Polaris ATV SCRAMBLER 500