![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
![Top End & Piston 84.45/+1.50 11:1 Yamaha YFM350X Wolverine 2WD [SRA] YFM350FG Grizzly 4WD [SRA] YFM350G Grizzly 2WD [SRA] YFM350BA Bruin 2WD [SRA] YFM350FA Bruin 4WD [SRA] YFM350FX Wolverine 4WD [SRA] YFM350FGI Grizzly 4WD [IRS] YFM350X Warrior YFM350FW Big Bear 4WD [SRA] YFM350R Raptor YFM350U Big Bear 2WD [SRA] YFM350ER Moto-4 1987-2014](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40056_1-1-430x430.jpg)
MPN: NA-40005-6K YAMAHA YFM350X WOLVERINE 2WD [SRA] YFM350FG GRIZZLY 4WD [SRA] YFM350G GRIZZLY 2WD [SRA] YFM350BA BRUIN 2WD [SRA] YFM350FA BRUIN 4WD [SRA] YFM350FX WOLVERINE 4WD [SRA] YFM350FGI GRIZZLY 4WD [IRS] YFM350X WARRIOR YFM350FW BIG BEAR 4WD [SRA] YFM350R RAPTOR YFM350U BIG BEAR 2WD [SRA] YFM350ER MOTO-4 1987-2014
MPN: NA-40005-4R YAMAHA BW350 1987-1988
![Top End & Piston 83.95/+1.00 11:1 Yamaha YFM350X Wolverine 2WD [SRA] YFM350FG Grizzly 4WD [SRA] YFM350G Grizzly 2WD [SRA] YFM350BA Bruin 2WD [SRA] YFM350FA Bruin 4WD [SRA] YFM350FX Wolverine 4WD [SRA] YFM350FGI Grizzly 4WD [IRS] YFM350X Warrior YFM350FW Big Bear 4WD [SRA] YFM350R Raptor YFM350U Big Bear 2WD [SRA] YFM350ER Moto-4 1987-2014](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40054_1-1-430x430.jpg)
MPN: NA-40005-4K YAMAHA YFM350X WOLVERINE 2WD [SRA] YFM350FG GRIZZLY 4WD [SRA] YFM350G GRIZZLY 2WD [SRA] YFM350BA BRUIN 2WD [SRA] YFM350FA BRUIN 4WD [SRA] YFM350FX WOLVERINE 4WD [SRA] YFM350FGI GRIZZLY 4WD [IRS] YFM350X WARRIOR YFM350FW BIG BEAR 4WD [SRA] YFM350R RAPTOR YFM350U BIG BEAR 2WD [SRA] YFM350ER MOTO-4 1987-2014
MPN: NA-40005-2R YAMAHA BW350 1987-1988
![Top End & Piston 83.45/+0.50 11:1 Yamaha YFM350X Wolverine 2WD [SRA] YFM350FG Grizzly 4WD [SRA] YFM350G Grizzly 2WD [SRA] YFM350BA Bruin 2WD [SRA] YFM350FA Bruin 4WD [SRA] YFM350FX Wolverine 4WD [SRA] YFM350FGI Grizzly 4WD [IRS] YFM350X Warrior YFM350FW Big Bear 4WD [SRA] YFM350R Raptor YFM350U Big Bear 2WD [SRA] YFM350ER Moto-4 1987-2014](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40052_1-1-430x430.jpg)
MPN: NA-40005-2K YAMAHA YFM350X WOLVERINE 2WD [SRA] YFM350FG GRIZZLY 4WD [SRA] YFM350G GRIZZLY 2WD [SRA] YFM350BA BRUIN 2WD [SRA] YFM350FA BRUIN 4WD [SRA] YFM350FX WOLVERINE 4WD [SRA] YFM350FGI GRIZZLY 4WD [IRS] YFM350X WARRIOR YFM350FW BIG BEAR 4WD [SRA] YFM350R RAPTOR YFM350U BIG BEAR 2WD [SRA] YFM350ER MOTO-4 1987-2014
![Top End & Piston 82.95/STD 11:1 Yamaha YFM350X Wolverine 2WD [SRA] YFM350FG Grizzly 4WD [SRA] YFM350G Grizzly 2WD [SRA] YFM350BA Bruin 2WD [SRA] YFM350FA Bruin 4WD [SRA] YFM350FX Wolverine 4WD [SRA] YFM350FGI Grizzly 4WD [IRS] YFM350X Warrior YFM350FW Big Bear 4WD [SRA] YFM350R Raptor YFM350U Big Bear 2WD [SRA] YFM350ER Moto-4 1987-2014](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4005_1-1-430x430.jpg)
![Alternative view of Top End & Piston 82.95/STD 11:1 Yamaha YFM350X Wolverine 2WD [SRA] YFM350FG Grizzly 4WD [SRA] YFM350G Grizzly 2WD [SRA] YFM350BA Bruin 2WD [SRA] YFM350FA Bruin 4WD [SRA] YFM350FX Wolverine 4WD [SRA] YFM350FGI Grizzly 4WD [IRS] YFM350X Warrior YFM350FW Big Bear 4WD [SRA] YFM350R Raptor YFM350U Big Bear 2WD [SRA] YFM350ER Moto-4 1987-2014](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4005_2-1-430x430.jpg)
MPN: NA-40005K YAMAHA YFM350X WOLVERINE 2WD [SRA] YFM350FG GRIZZLY 4WD [SRA] YFM350G GRIZZLY 2WD [SRA] YFM350BA BRUIN 2WD [SRA] YFM350FA BRUIN 4WD [SRA] YFM350FX WOLVERINE 4WD [SRA] YFM350FGI GRIZZLY 4WD [IRS] YFM350X WARRIOR YFM350FW BIG BEAR 4WD [SRA] YFM350R RAPTOR YFM350U BIG BEAR 2WD [SRA] YFM350ER MOTO-4 1987-2014
MPN: NA-40004-6K YAMAHA YFM660R RAPTOR 2001-2005
MPN: NA-40004-4K YAMAHA YFM660R RAPTOR 2001-2005