this is one  pilot jets #42.5 fits mikuni carbs

This replaces Yamaha 4G0-14142-42-A0 JET,PILOT #42.5 is used on these models and components:

 
1987 YFM350XT CARBURETOR
1988 TERRA PRO - YFP350U CARBURETOR
1988 WARRIOR - YFM350XU CARBURETOR
1989 WARRIOR - YFM350XW CARBURETOR
1990 WARRIOR - YFM350XA CARBURETOR
1991 WARRIOR - YFM350XB CARBURETOR
1991 WARRIOR - YFM350XB_M CARBURETOR
1992 WARRIOR - YFM350XD CARBURETOR
1992 WARRIOR - YFM350XD_M CARBURETOR
1993 WARRIOR - YFM350XE CARBURETOR
1993 WARRIOR - YFM350XE_M CARBURETOR
1994 WARRIOR - YFM350XF CARBURETOR
1994 WARRIOR - YFM350XF_M CARBURETOR
1995 WARRIOR - YFM350XG CARBURETOR
1995 WARRIOR - YFM350XG_M CARBURETOR
1996 WARRIOR - YFM350XH CARBURETOR
1996 WARRIOR - YFM350XH_M CARBURETOR
1996 WOLVERINE 4WD (ME & NH Only) - YFM350FXH_MNH CARBURETOR
1996 WOLVERINE 4WD - YFM350FXH CARBURETOR
1996 WOLVERINE 4WD - YFM350FXH_ CARBURETOR
1997 BIG BEAR 4WD (ME & NH Only) - YFM350FWBJ_MNH CARBURETOR
1997 BIG BEAR 4WD - YFM350FWBJ CARBURETOR
1997 WARRIOR - YFM350XJ CARBURETOR
1997 WARRIOR - YFM350XJ_MNH CARBURETOR
1997 WOLVERIINE - YFM35FXJ_M CARBURETOR
1997 WOLVERINE - YFM35FXJ CARBURETOR
2000 WARRIOR - YFM350XM CARBURETOR
2000 WARRIOR - YFM350XMC CARBURETOR
1970 XS1 CARBURETOR (XS1 - XS1B)
1972 XS2 CARBURETOR (XS2) (TX650)
1973 TX650 CARBURETOR (XS2) (TX650)
1977 XS400D CARBURETOR
1978 XS400-2E CARBURETOR
1978 XS400E CARBURETOR
1978 XS500E CARBURETOR
1978 XS750E CARBURETOR
1978 XS750SE CARBURETOR
1979 XS750F CARBURETOR
1980 XS1100SG CARBURETOR
1981 XS1100H CARBURETOR
1981 XS1100SH CABURETOR
1982 XS400J CARBURETOR
1982 XS400RJ CARBURETOR
1983 XS400K CARBURETOR
1983 XS400RK CARBURETOR
1983 XVZ12TDK CARBURETOR
1983 XVZ12TK CARBURETOR
1984 XVZ12KC2 CARBURETOR
1984 XVZ12L CARBURETOR
1996 SEROW - XT225H CARBURETOR
1996 SEROW - XT225HC CARBURETOR
1997 SEROW - XT225J CARBURETOR
1997 SEROW - XT225JC CARBURETOR

international Buyers – Please Note: 

Import duties, taxes, and charges are not included in the item price or shipping cost.
 These charges are the buyer's responsibility.

Please check with your country's customs office to determine what these
 additional costs will be prior to bidding or buying.