![Top End & Piston 84.42/STD 11:1 Yamaha YFM400FG Grizzly 4WD [IRS] YFM400FA Kodiak 4WD [SRA] YFM400A Kodiak 2WD [SRA] 2000-2008](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4008_1-1-430x430.jpg)
![Alternative view of Top End & Piston 84.42/STD 11:1 Yamaha YFM400FG Grizzly 4WD [IRS] YFM400FA Kodiak 4WD [SRA] YFM400A Kodiak 2WD [SRA] 2000-2008](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4008_2-1-430x430.jpg)
MPN: NA-40008K YAMAHA YFM400FG GRIZZLY 4WD [IRS] YFM400FA KODIAK 4WD [SRA] YFM400A KODIAK 2WD [SRA] 2000-2008
MPN: NA-40007R YAMAHA XT600 TT600 1984-1995
MPN: NA-40007-4R YAMAHA XT600 TT600 1984-1995
![Top End & Piston 96/+1.00 11:1 Yamaha XT600 YFM600FG Grizzly 4WD [SRA] 1984-2001](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40074_1-1-430x430.jpg)
MPN: NA-40007-4K YAMAHA XT600 YFM600FG GRIZZLY 4WD [SRA] 1984-2001
MPN: NA-40007-2R YAMAHA XT600 TT600 1984-1995
![Top End & Piston 95.5/+0.50 11:1 Yamaha XT600 YFM600FG Grizzly 4WD [SRA] 1984-2001](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40072_1-1-430x430.jpg)
MPN: NA-40007-2K YAMAHA XT600 YFM600FG GRIZZLY 4WD [SRA] 1984-2001
![Top End & Piston 95/STD 11:1 Yamaha XT600 YFM600FG Grizzly 4WD [SRA] 1984-2001](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4007_1-1-430x430.jpg)
![Alternative view of Top End & Piston 95/STD 11:1 Yamaha XT600 YFM600FG Grizzly 4WD [SRA] 1984-2001](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4007_2-1-430x430.jpg)
MPN: NA-40007K YAMAHA XT600 YFM600FG GRIZZLY 4WD [SRA] 1984-2001
![Top End & Piston 84/+1.00 11:1 Yamaha YFM400FB Big Bear 4WD [SRA] YFM400FA Kodiak 4WD [SRA] YFM400 Big Bear 2WD [SRA] YFM400FBI Big Bear 4WD [IRS] 1993-2010](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40064_1-1-430x430.jpg)
MPN: NA-40006-4K YAMAHA YFM400FB BIG BEAR 4WD [SRA] YFM400FA KODIAK 4WD [SRA] YFM400 BIG BEAR 2WD [SRA] YFM400FBI BIG BEAR 4WD [IRS] 1993-2010
![Top End & Piston 83.5/+0.50 11:1 Yamaha YFM400FB Big Bear 4WD [SRA] YFM400FA Kodiak 4WD [SRA] YFM400 Big Bear 2WD [SRA] YFM400FBI Big Bear 4WD [IRS] 1993-2010](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40062_1-1-430x430.jpg)
MPN: NA-40006-2K YAMAHA YFM400FB BIG BEAR 4WD [SRA] YFM400FA KODIAK 4WD [SRA] YFM400 BIG BEAR 2WD [SRA] YFM400FBI BIG BEAR 4WD [IRS] 1993-2010
![TOP END REPAIR KIT Yamaha YFM400FB Big Bear 4WD [SRA] YFM400FA Kodiak 4WD [SRA] YFM400 Big Bear 2WD [SRA] YFM400FBI Big Bear 4WD [IRS] 1993-2010](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40061_1-1-430x430.jpg)
MPN: NA-40006-1K YAMAHA YFM400FB BIG BEAR 4WD [SRA] YFM400FA KODIAK 4WD [SRA] YFM400 BIG BEAR 2WD [SRA] YFM400FBI BIG BEAR 4WD [IRS] 1993-2010
![Top End & Piston 83/STD 11:1 Yamaha YFM400FB Big Bear 4WD [SRA] YFM400FA Kodiak 4WD [SRA] YFM400 Big Bear 2WD [SRA] YFM400FBI Big Bear 4WD [IRS] 1993-2010](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4006_1-1-430x430.jpg)
![Alternative view of Top End & Piston 83/STD 11:1 Yamaha YFM400FB Big Bear 4WD [SRA] YFM400FA Kodiak 4WD [SRA] YFM400 Big Bear 2WD [SRA] YFM400FBI Big Bear 4WD [IRS] 1993-2010](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4006_2-1-430x430.jpg)
MPN: NA-40006K YAMAHA YFM400FB BIG BEAR 4WD [SRA] YFM400FA KODIAK 4WD [SRA] YFM400 BIG BEAR 2WD [SRA] YFM400FBI BIG BEAR 4WD [IRS] 1993-2010
MPN: NA-40005R YAMAHA BW350 1987-1988