![Top End & Piston 49.00/STD 11:1 Yamaha YFM125G Grizzly [SRA] YFA1 Breeze 125 1989-2013](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4019_1-1-430x430.jpg)
![Alternative view of Top End & Piston 49.00/STD 11:1 Yamaha YFM125G Grizzly [SRA] YFA1 Breeze 125 1989-2013](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4019_2-1-430x430.jpg)
MPN: NA-40019K YAMAHA YFM125G GRIZZLY [SRA] YFA1 BREEZE 125 1989-2013
![Top End & Piston 72.45/+1.50 11:1 Yamaha YFM250B Big Bear [SRA] YFM250B Bruin 2WD [SRA] YFM250X Bear Tracker 2WD [SRA] YFB250FW Timberwolf 4WD [SRA] YFB250 Timberwolf 2WD [SRA] 1992-2009](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40156_1-1-430x430.jpg)
MPN: NA-40015-6K YAMAHA YFM250B BIG BEAR [SRA] YFM250B BRUIN 2WD [SRA] YFM250X BEAR TRACKER 2WD [SRA] YFB250FW TIMBERWOLF 4WD [SRA] YFB250 TIMBERWOLF 2WD [SRA] 1992-2009
![Top End & Piston 71.95/+1.00 11:1 Yamaha YFM250B Big Bear [SRA] YFM250B Bruin 2WD [SRA] YFM250X Bear Tracker 2WD [SRA] YFB250FW Timberwolf 4WD [SRA] YFB250 Timberwolf 2WD [SRA] 1992-2009](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40154_1-1-430x430.jpg)
MPN: NA-40015-4K YAMAHA YFM250B BIG BEAR [SRA] YFM250B BRUIN 2WD [SRA] YFM250X BEAR TRACKER 2WD [SRA] YFB250FW TIMBERWOLF 4WD [SRA] YFB250 TIMBERWOLF 2WD [SRA] 1992-2009
![Top End & Piston 71.45/+0.50 11:1 Yamaha YFM250B Big Bear [SRA] YFM250B Bruin 2WD [SRA] YFM250X Bear Tracker 2WD [SRA] YFB250FW Timberwolf 4WD [SRA] YFB250 Timberwolf 2WD [SRA] 1992-2009](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40152_1-1-430x430.jpg)
MPN: NA-40015-2K YAMAHA YFM250B BIG BEAR [SRA] YFM250B BRUIN 2WD [SRA] YFM250X BEAR TRACKER 2WD [SRA] YFB250FW TIMBERWOLF 4WD [SRA] YFB250 TIMBERWOLF 2WD [SRA] 1992-2009
![Top End & Piston 70.95/STD 11:1 Yamaha YFM250B Big Bear [SRA] YFM250B Bruin 2WD [SRA] YFM250X Bear Tracker 2WD [SRA] YFB250FW Timberwolf 4WD [SRA] YFB250 Timberwolf 2WD [SRA] 1992-2009](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4015_1-1-430x430.jpg)
![Alternative view of Top End & Piston 70.95/STD 11:1 Yamaha YFM250B Big Bear [SRA] YFM250B Bruin 2WD [SRA] YFM250X Bear Tracker 2WD [SRA] YFB250FW Timberwolf 4WD [SRA] YFB250 Timberwolf 2WD [SRA] 1992-2009](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4015_2-1-430x430.jpg)
MPN: NA-40015K YAMAHA YFM250B BIG BEAR [SRA] YFM250B BRUIN 2WD [SRA] YFM250X BEAR TRACKER 2WD [SRA] YFB250FW TIMBERWOLF 4WD [SRA] YFB250 TIMBERWOLF 2WD [SRA] 1992-2009
![Top End & Piston HYPERDRYVE 101.99/+0.02 Yamaha YXM700 Viking YFM700G Grizzly Fi 4WD [IRS] YFM700R Raptor 2014-2018](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4013c_1-1-430x430.jpg)
MPN: NA-40013-CK YAMAHA YXM700 VIKING YFM700G GRIZZLY FI 4WD [IRS] YFM700R RAPTOR 2014-2018
![Top End & Piston HYPERDRYVE 101.98/+0.01 Yamaha YXM700 Viking YFM700G Grizzly Fi 4WD [IRS] YFM700R Raptor 2014-2018](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4013b_1-1-430x430.jpg)
MPN: NA-40013-BK YAMAHA YXM700 VIKING YFM700G GRIZZLY FI 4WD [IRS] YFM700R RAPTOR 2014-2018
![Top End & Piston HYPERDRYVE 101.97/STD Yamaha YXM700 Viking YFM700G Grizzly Fi 4WD [IRS] YFM700R Raptor 2014-2018](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4013_1-1-430x430.jpg)
MPN: NA-40013K YAMAHA YXM700 VIKING YFM700G GRIZZLY FI 4WD [IRS] YFM700R RAPTOR 2014-2018
![Top End & Piston 101.99/+0.02 9.2:1 Yamaha YFM700G Grizzly Fi 4WD [IRS] YFM700R Raptor YXR700F Rhino 700 2006-2016](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4012c_1-1-430x430.jpg)
MPN: NA-40012-CK YAMAHA YFM700G GRIZZLY FI 4WD [IRS] YFM700R RAPTOR YXR700F RHINO 700 2006-2016
![Top End & Piston 101.98/+0.01 9.2:1 Yamaha YFM700G Grizzly Fi 4WD [IRS] YFM700R Raptor YXR700F Rhino 700 2006-2016](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4012b_1-1-430x430.jpg)
MPN: NA-40012-BK YAMAHA YFM700G GRIZZLY FI 4WD [IRS] YFM700R RAPTOR YXR700F RHINO 700 2006-2016
![Top End & Piston 101.97/STD 9.2:1 Yamaha YFM700G Grizzly Fi 4WD [IRS] YFM700R Raptor YXR700F Rhino 700 2006-2016](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4012_1-1-430x430.jpg)
![Alternative view of Top End & Piston 101.97/STD 9.2:1 Yamaha YFM700G Grizzly Fi 4WD [IRS] YFM700R Raptor YXR700F Rhino 700 2006-2016](https://omxsports.com/wp-content/uploads/2025/08/namura_186_4012_2-1-430x430.jpg)
MPN: NA-40012K YAMAHA YFM700G GRIZZLY FI 4WD [IRS] YFM700R RAPTOR YXR700F RHINO 700 2006-2016
![Top End & Piston 85.45/+1.00 11:1 Yamaha YFM450FGP Grizzly 4WD EPS [IRS] YXR450F Rhino 450 YFM450FG Grizzly 4WD [IRS] YFM450FA Kodiak 4WD [IRS] YFM450FX Wolverine 4WD [SRA] 2003-2014](https://omxsports.com/wp-content/uploads/2025/08/namura_186_40114_1-1-430x430.jpg)
MPN: NA-40011-4K YAMAHA YFM450FGP GRIZZLY 4WD EPS [IRS] YXR450F RHINO 450 YFM450FG GRIZZLY 4WD [IRS] YFM450FA KODIAK 4WD [IRS] YFM450FX WOLVERINE 4WD [SRA] 2003-2014