More Choices
- More Namura Engines & Components
- See more from Namura
- See more Engines & Components
- See ATV & UTV products
Namura Piston Assembly - 100mm Bore - NA-40004
- Part #: 133191S
- Manufacturer Part #: NA-40004
- MSRP Price: $113.49
- Our Price: $102.99
$10.50 (9%)
4 on Hand
Overview of Namura Piston Assembly - 100mm Bore - NA-40004
- High-performance Namura pistons are engineered in the USA, manufactured in Taiwan
- High-silicon content Hypereutectic cast aluminum material for less heat expansion, tighter clearances, increased hardness, longer life and reduced scuffing
- Features machined, smooth piston crowns for reduced carbon buildup, increased horsepower and fuel economy
- Hard anodized crowns are 75% stronger than non-anodized, providing minimal expansion and reducing the chance of cold seizures when combined with Teflon/Molybdenum coated skirts
- MOS2 (Teflon/Molybdenum) coated skirts perform at the highest standards, reducing friction and heat for added power and longevity
- Namura rings match the OEM design except as noted
- -B (.0004 in.) and -C (.0008 in.) fractional oversize pistons, available for some applications, extend the life of your expensive cylinder by renewing the original clearance if it's slightly worn, avoiding an expensive sleeve installation
- Piston assemblies include ring(s), wrist pin and circlips
HOW TO ORDER
All piston and ring sizes are indicated by the suffix number/letters as shown in the chart below. Use the PART NO. listed for your machine, and complete it by adding the letter(s) and/or numbers to the end, indicating the exact size needed - standard, fractional or incremental oversize (no cylinder boring or sleeving involved) or regular oversizes, which require boring or sleeving of the cylinder, depending on the material.
Included Items:
(1) Pison
(1) Ring set
(2) Wrist pin clips
(1) Wrist pin
Specs
| Bore Size | 100mm |
|---|---|
| Type | Piston Assembly |
| Units | Each |
| Weight | 1.4 lbs |
Specs for Namura Piston Assembly - 100mm Bore - NA-40004
| Bore Size | 100mm |
|---|---|
| Type | Piston Assembly |
| Units | Each |
| Weight | 1.4 lbs |
Fitment for Namura Piston Assembly - 100mm Bore - NA-40004
Part 133191S fits the following machines
See if this part fits your ride
 Yamaha |
|---|
| 2004 Yamaha YFM660F Grizzly 4x4 |
| 2003 Yamaha YFM660F Grizzly 4x4 |
| 2002 Yamaha YFM660F Grizzly 4x4 |
| 2003 Yamaha YFM660F-GY Grizzly 4x4 Limited Edition |
| 2008 Yamaha YFM660FA Grizzly 4x4 |
| 2007 Yamaha YFM660FA Grizzly 4x4 |
| 2006 Yamaha YFM660FA Grizzly 4x4 |
| 2005 Yamaha YFM660FA Grizzly 4x4 |
| 2006 Yamaha YFM660FAH Grizzly 4x4 Hardwoods Hunter Edition |
| 2005 Yamaha YFM660FAH Grizzly 4x4 Hardwoods Hunter Edition |
| 2006 Yamaha YFM660FAHD Grizzly 4x4 Ducks Unlimited Edition |
| 2005 Yamaha YFM660FAHW Grizzly 4x4 Wetlands Hunter Edition |
| 2006 Yamaha YFM660FASE Grizzly 4x4 Special Edition |
| 2005 Yamaha YFM660FASE Grizzly 4x4 Special Edition |
| 2008 Yamaha YFM660FG Grizzly 4x4 |
| 2007 Yamaha YFM660FG Grizzly 4x4 |
| 2008 Yamaha YFM660FGH Grizzly 4x4 Hunter Edition |
| 2007 Yamaha YFM660FGH Grizzly 4x4 Hunter Edition |
| 2004 Yamaha YFM660FH Grizzly 4x4 Hardwoods Hunter Edition |
| 2002 Yamaha YFM660FH Grizzly 4x4 Hunter Edition |
| 2003 Yamaha YFM660FH-H Grizzly 4x4 Hardwoods Hunter Edition |
| 2004 Yamaha YFM660FH-WL Grizzly 4x4 Wetlands Hunter Edition |
| 2003 Yamaha YFM660FH-WL Grizzly 4x4 Wetlands Hunter Edition |
| 2005 Yamaha YFM660FLE Grizzly 4x4 Limited Edition |
| 2004 Yamaha YFM660FLE Grizzly 4x4 Limited Edition |
| 2003 Yamaha YFM660FLE Grizzly 4x4 Limited Edition |
| 2005 Yamaha YFM660R Raptor |
| 2004 Yamaha YFM660R Raptor |
| 2003 Yamaha YFM660R Raptor |
| 2002 Yamaha YFM660R Raptor |
| 2001 Yamaha YFM660R Raptor |
| 2005 Yamaha YFM660RLE Raptor Limited Edition |
| 2004 Yamaha YFM660RLE Raptor Limited Edition |
| 2003 Yamaha YFM660RLE Raptor Limited Edition |
| 2002 Yamaha YFM660RLE Raptor Limited Edition |
| 2007 Yamaha YXR660F Rhino 4x4 |
| 2007 Yamaha YXR660FA Rhino 4x4 |
| 2006 Yamaha YXR660FA Rhino 4x4 |
| 2005 Yamaha YXR660FA Rhino 4x4 |
| 2004 Yamaha YXR660FA Rhino 4x4 |
| 2006 Yamaha YXR660FAEX Rhino 4x4 Exploring Edition |
| 2006 Yamaha YXR660FAH Rhino 4x4 Hunter Edition |
| 2005 Yamaha YXR660FAH Rhino 4x4 Hunter Edition |
| 2004 Yamaha YXR660FAH Rhino 4x4 Hunter Edition |
| 2006 Yamaha YXR660FAH Rhino 4x4 Hunter Exploring Edition |
| 2007 Yamaha YXR660FASE Rhino 4x4 Special Edition |
| 2006 Yamaha YXR660FASE Rhino 4x4 Special Edition |
| 2007 Yamaha YXR660FDU Rhino 4x4 Ducks Unlimited Edition |
| 2007 Yamaha YXR660FEX Rhino 4x4 Exploring Edition |
| 2007 Yamaha YXR660FH Rhino 4x4 Hunter Edition |
| 2007 Yamaha YXR660FSE Rhino 4x4 Special Edition |
| 2007 Yamaha YXR660FSP Rhino 4x4 Sport Edition |
Reviews for Namura Piston Assembly - 100mm Bore - NA-40004
There are no customer reviews for this item yet.
5 Stars
0
4 Stars
0
3 Stars
0
2 Stars
0
1 Stars
0
