The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco's forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you're looking for.
100.50 mm Bore - 9.9:1 CR
- Improved tensile strength of forged material optimizes strength and service life
- Designed and built for each specific 4-stroke powersports engine
- Dedicated forgings allow for optimized strength-to-weight ratio
- Includes high-quality piston rings, wrist pin(s), and circlips
- Engineered, forged, and machined in the USA in Mentor, OH
- 100.50 mm Bore, 9.9:1 CR
Fits
2001 Yamaha YFM660R Raptor Base
2002 Yamaha YFM660F Grizzly 4x4 Base
2002 Yamaha YFM660R Raptor Base
2003 Yamaha YFM660F Grizzly 4x4 Base
2003 Yamaha YFM660R Raptor Base
2004 Yamaha YFM660F Grizzly 4x4 Base
2004 Yamaha YFM660R Raptor Base
2004 Yamaha YXR66F Rhino 660 Base
2005 Yamaha YFM660F Grizzly 4x4 Base
2005 Yamaha YFM660R Raptor Base
2005 Yamaha YXR66F Rhino 660 Base
2006 Yamaha YFM660F Grizzly 4x4 Base
2006 Yamaha YXR66F Rhino 660 Base
2006 Yamaha YXR66F Rhino 660 Exploring Edition Base
2006 Yamaha YXR66F Rhino 660 Special Edition Base
2007 Yamaha YFM660F Grizzly 4x4 Base
2007 Yamaha YXR66F Rhino 660 Base
2007 Yamaha YXR66F Rhino 660 Ducks Unlimited Base
2007 Yamaha YXR66F Rhino 660 Exploring Edition Base
2007 Yamaha YXR66F Rhino 660 Special Edition Base
2007 Yamaha YXR66F Rhino 660 Sport Edition Base
2008 Yamaha YFM660F Grizzly 4x4 Base