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Namura Piston Assembly - 85.45mm Bore - NA-40011-4

  • Part #:
    1333444
  • Manufacturer Part #:
    NA-40011-4

MSRP Price: $119.95

Our Price: $107.96

You Save:
$11.99 (10%)
Please select Bore Size
2 on Hand

Overview of Namura Piston Assembly - 85.45mm Bore - NA-40011-4

  • 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 its slightly worn, avoiding an expensive sleeve installation
  • Piston assemblies include ring(s), wrist pin and circlips


For replacement rings order PART NO. 13-33444R

Specs for Namura Piston Assembly - 85.45mm Bore - NA-40011-4

Bore Size 85.45 mm
Type Piston Assembly
Type Piston w/Ring Set
Units Each
Weight 0.95 lbs

Specs for Namura Piston Assembly - 85.45mm Bore - NA-40011-4

Bore Size 85.45 mm
Type Piston Assembly
Type Piston w/Ring Set
Units Each
Weight 0.95 lbs

Fitment for Namura Piston Assembly - 85.45mm Bore - NA-40011-4

See if this part fits your ride

Part 1333444 fits the following machines

Yamaha
  • 2006 Yamaha YFM450FA Kodiak 4x4
  • 2005 Yamaha YFM450FA Kodiak 4x4
  • 2004 Yamaha YFM450FA Kodiak 4x4
  • 2003 Yamaha YFM450FA Kodiak 4x4
  • 2006 Yamaha YFM450FAH Kodiak 4x4 Hunter Edition
  • 2005 Yamaha YFM450FAH Kodiak 4x4 Hunter Edition
  • 2004 Yamaha YFM450FAH Kodiak 4x4 Hunter Edition
  • 2003 Yamaha YFM450FAH Kodiak 4x4 Hunter Edition
  • 2013 Yamaha YFM450FG Grizzly 4x4
  • 2012 Yamaha YFM450FG Grizzly 4x4
  • 2011 Yamaha YFM450FG Grizzly 4x4
  • 2010 Yamaha YFM450FG Grizzly 4x4
  • 2009 Yamaha YFM450FG Grizzly 4x4
  • 2008 Yamaha YFM450FG Grizzly 4x4
  • 2007 Yamaha YFM450FG Grizzly 4x4
  • 2013 Yamaha YFM450FGH Grizzly 4x4 Hunter Edition
  • 2012 Yamaha YFM450FGH Grizzly 4x4 Hunter Edition
  • 2011 Yamaha YFM450FGH Grizzly 4x4 Hunter Edition
  • 2010 Yamaha YFM450FGH Grizzly 4x4 Hunter Edition
  • 2009 Yamaha YFM450FGH Grizzly 4x4 Hunter Edition
  • 2008 Yamaha YFM450FGH Grizzly 4x4 Hunter Edition
  • 2007 Yamaha YFM450FGH Grizzly 4x4 Hunter Edition
  • 2007 Yamaha YFM450FGOH Grizzly 4x4 Outdoorsman Edition
  • 2013 Yamaha YFM450FGPH Grizzly 4x4 EPS Hunter Edition
  • 2012 Yamaha YFM450FGPH Grizzly 4x4 EPS Hunter Edition
  • 2011 Yamaha YFM450FGPH Grizzly 4x4 EPS Hunter Edition
  • 2007 Yamaha YFM450FGSE Grizzly 4x4 Special Edition
  • 2008 Yamaha YFM450FGSP Grizzly 4x4 Special Edition
  • 2013 Yamaha YFM450FHP Grizzly 4x4 EPS
  • 2012 Yamaha YFM450FHP Grizzly 4x4 EPS
  • 2011 Yamaha YFM450FHP Grizzly 4x4 EPS
  • 2006 Yamaha YFM450FSE Kodiak 4x4 Special Edition
  • 2005 Yamaha YFM450FSE Kodiak 4x4 Special Edition
  • 2010 Yamaha YFM450FX Wolverine 4x4
  • 2009 Yamaha YFM450FX Wolverine 4x4
  • 2008 Yamaha YFM450FX Wolverine 4x4
  • 2007 Yamaha YFM450FX Wolverine 4x4
  • 2006 Yamaha YFM450FX Wolverine 4x4
  • 2008 Yamaha YFM450FXSE Wolverine 4x4 Special Edition
  • 2007 Yamaha YFM450FXSE Wolverine 4x4 Special Edition
  • 2009 Yamaha YXR450F Rhino 4x4
  • 2008 Yamaha YXR450F Rhino 4x4
  • 2008 Yamaha YXR450FA Rhino 450 4x4
  • 2007 Yamaha YXR450FA Rhino 450 4x4
  • 2006 Yamaha YXR450FA Rhino 450 4x4
  • 2006 Yamaha YXR450FAH Rhino 4x4 Hunter Edition
  • 2009 Yamaha YXR450FH Rhino 4x4 Hunter Edition
  • 2008 Yamaha YXR450FH Rhino 4x4 Hunter Edition
  • 2007 Yamaha YXR450FH Rhino 4x4 Hunter Edition
  • 2007 Yamaha YXR450FSE Rhino 4x4 Special Edition
  • 2008 Yamaha YXR450FSP Rhino 4x4 Special Edition
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Instructions and Manuals for Namura Piston Assembly - 85.45mm Bore - NA-40011-4

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