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  • Namura

Namura Piston Assembly - 100mm Bore - NA-40004

  • Part #: 133191S
  • Manufacturer Part #: NA-40004
  • MSRP Price: $113.49
  • Our Price: $102.99
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133191S
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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

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