Kit includes crankshaft assembly, main bearings, and bottom-end gasket kit
Fit the models:
| YAMAHA |
YFM 660 F 4X4 |
2003 |
| YAMAHA |
YFM 660 F 4X4 |
2004 |
| YAMAHA |
YFM 660 F 4X4 |
2002 |
| YAMAHA |
YFM 660 F LE 4X4 |
2004 |
| YAMAHA |
YFM 660 FA 4X4 |
2005 |
| YAMAHA |
YFM 660 FA 4X4 |
2006 |
| YAMAHA |
YFM 660 FA SE 4X4 |
2006 |
| YAMAHA |
YFM 660 FA SE 4X4 |
2005 |
| YAMAHA |
YFM 660 FAH 4X4 |
2006 |
| YAMAHA |
YFM 660 FAH 4X4 |
2005 |
| YAMAHA |
YFM 660 FAHD 4X4 |
2006 |
| YAMAHA |
YFM 660 FAHW 4X4 |
2005 |
| YAMAHA |
YFM 660 FG 4X4 |
2008 |
| YAMAHA |
YFM 660 FG 4X4 |
2007 |
| YAMAHA |
YFM 660 FGH 4X4 |
2008 |
| YAMAHA |
YFM 660 FGH 4X4 |
2007 |
| YAMAHA |
YFM 660 FH 4X4 |
2002 |
| YAMAHA |
YFM 660 FH 4X4 |
2004 |
| YAMAHA |
YFM 660 FH 4X4 |
2003 |
| YAMAHA |
YXR 660 F 4X4 |
2007 |
| YAMAHA |
YXR 660 F DU 4X4 |
2007 |
| YAMAHA |
YXR 660 F EX 4X4 |
2007 |
| YAMAHA |
YXR 660 F SE 4X4 |
2007 |
| YAMAHA |
YXR 660 F SP 4X4 |
2007 |
| YAMAHA |
YXR 660 FA 4X4 |
2006 |
| YAMAHA |
YXR 660 FA 4X4 |
2005 |
| YAMAHA |
YXR 660 FA EX 4X4 |
2006 |
| YAMAHA |
YXR 660 FA SE 4X4 |
2006 |
| YAMAHA |
YXR 660 FAH 4X4 |
2006 |
| YAMAHA |
YXR 660 FAH 4X4 |
2005 |
| YAMAHA |
YXR 660 FH 4X4 |
2007 |

Since 1940, Wiseco has manufactured forged pistons of outstanding quality for motorcycles, motocross bikes, snowmobiles, and 4-wheeler's. After almost 70 years in the industry, Wiseco has become synonymous with high-quality products that exceed the customer's requirements.
| Brand |
Model |
Year |
Name |
CC |
| YAMAHA |
YFM |
2002 |
Raptor |
660 |
| YAMAHA |
YFM |
2003 |
Raptor |
660 |
| YAMAHA |
YFM |
2004 |
Raptor |
660 |
| YAMAHA |
YFM |
2004 |
Raptor Limited Edition |
660 |
| YAMAHA |
YFM |
2005 |
Raptor |
660 |
| YAMAHA |
YFM |
2002 |
Grizzly |
660 |
| YAMAHA |
YFM |
2002 |
Grizzly Silver |
660 |
| YAMAHA |
YFM |
2002 |
Grizzly Hunter |
660 |
| YAMAHA |
YFM |
2003 |
Grizzly |
660 |
| YAMAHA |
YFM |
2003 |
Grizzly Titanium |
660 |
| YAMAHA |
YFM |
2003 |
Grizzly Hunter Wetland Edition |
660 |
| YAMAHA |
YFM |
2004 |
Grizzly |
660 |
| YAMAHA |
YFM |
2004 |
Grizzly Hunter Wetland Edition |
660 |
| YAMAHA |
YFM |
2004 |
Grizzly Limited Edition |
660 |
| YAMAHA |
YFM |
2004 |
Grizzly Hunter Hardwoods Camo |
660 |
| YAMAHA |
YFM |
2005 |
Grizzly |
660 |
| YAMAHA |
YFM |
2005 |
Grizzly Hunter |
660 |
| YAMAHA |
YFM |
2005 |
Grizzly Hunter Wetland Edition |
660 |
| YAMAHA |
YFM |
2005 |
Grizzly Special Edition |
660 |
| YAMAHA |
YFM |
2006 |
Grizzly |
660 |
| YAMAHA |
YFM |
2006 |
Grizzly Hunter |
660 |
| YAMAHA |
YFM |
2006 |
Grizzly Hunter Ducks Unlimited Edition |
660 |
| YAMAHA |
YFM |
2006 |
Grizzly Special Edition |
660 |
| YAMAHA |
YXR |
2005 |
Rhino |
660 |
| YAMAHA |
YXR |
2005 |
Rhino Hunter Hardwoods Camo |
660 |
| YAMAHA |
YXR |
2006 |
Rhino |
660 |
| YAMAHA |
YXR |
2006 |
Rhino Hunter |
660 |
| YAMAHA |
YXR |
2006 |
Rhino Special Edition |
660 |
| YAMAHA |
YXR |
2006 |
Rhino Exploring Edition |
660 |
| YAMAHA |
YXR |
2007 |
Rhino |
660 |
| YAMAHA |
YXR |
2007 |
Rhino Special Edition |
660 |
| YAMAHA |
YXR |
2007 |
Rhino Sport Edition |
660 |
| YAMAHA |
YXR |
2007 |
Rhino Ducks Unlimited Edition |
660 |
| YAMAHA |
YXR |
2007 |
Rhino Exploring Edition |
660 |
| YAMAHA |
YXR |
2007 |
Rhino Hunter Hardwoods Camo |
660 |
| YAMAHA |
YFM |
2007 |
Grizzly |
660 |
| YAMAHA |
YFM |
2008 |
Grizzly |
660 |
| YAMAHA |
YFM |
2007 |
Grizzly Hunter |
660 |
| YAMAHA |
YFM |
2008 |
Grizzly Hunter |
660 |
| YAMAHA |
YFM |
2005 |
Raptor Special Edition |
660 |
| YAMAHA |
YFM |
2003 |
Grizzly Hunter Realtree Hardwood |
660 |
| YAMAHA |
YFM |
2003 |
Raptor Limited Edition |
660 |