The NAMURA NA-40019 Piston Kit is a standard-bore replacement designed for select Yamaha YFM125G Grizzly all-terrain vehicles from 2004 through 2013. This kit features a 49.00 mm standard-bore piston with a 9.0:1 compression ratio, providing a dependable replacement solution for compatible engine rebuilds and maintenance.
Fitment: Fits 2004–2013 Yamaha YFM125G Grizzly models equipped with SRA suspension. Verify the vehicle model and year before installation to ensure proper compatibility. The NAMURA NA-40019 is not compatible with OEM piston rings, and its rings will not work with an OEM piston. Use the piston and rings together as a matched replacement set.
Manufactured by NAMURA and supplied under vendor part number NA-40019, this piston kit is intended to restore proper engine function when the original piston or rings are worn or damaged. Professional installation and careful inspection of the cylinder, wrist pin, circlips, and related components are recommended during engine service.
Features:
- Brand: NAMURA
- Manufacturer: NAMURA
- Vendor Part Number: NA-40019
- Size: 49.00 mm standard bore
- Compression Ratio: 9.0:1
- Application: Yamaha YFM125G Grizzly
- Fitment: 2004–2013 Yamaha YFM125G Grizzly models with SRA suspension
- Compatibility: Will not accept OEM rings, and the included rings will not work with an OEM piston
Fitment:
1989 Yamaha YFA1 Breeze 125
1990 Yamaha YFA1 Breeze 125
1991 Yamaha YFA1 Breeze 125
1992 Yamaha YFA1 Breeze 125
1993 Yamaha YFA1 Breeze 125
1994 Yamaha YFA1 Breeze 125
1995 Yamaha YFA1 Breeze 125
1996 Yamaha YFA1 Breeze 125
1997 Yamaha YFA1 Breeze 125
1998 Yamaha YFA1 Breeze 125
1999 Yamaha YFA1 Breeze 125
2000 Yamaha YFA1 Breeze 125
2001 Yamaha YFA1 Breeze 125
2002 Yamaha YFA1 Breeze 125
2003 Yamaha YFA1 Breeze 125
2004 Yamaha YFA1 Breeze 125
2004 Yamaha YFM125G Grizzly [SRA]
2005 Yamaha YFM125G Grizzly [SRA]
2005 Yamaha YFM125GH Grizzly Hunter
2006 Yamaha YFM125G Grizzly [SRA]
2006 Yamaha YFM125GH Grizzly Hunter
2007 Yamaha YFM125G Grizzly [SRA]
2007 Yamaha YFM125GH Grizzly Hunter
2008 Yamaha YFM125G Grizzly [SRA]
2008 Yamaha YFM125GH Grizzly Hunter
2009 Yamaha YFM125G Grizzly [SRA]
2010 Yamaha YFM125G Grizzly [SRA]
2011 Yamaha YFM125G Grizzly [SRA]
2012 Yamaha YFM125G Grizzly [SRA]
2013 Yamaha YFM125G Grizzly [SRA]