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Namura Piston Assembly - 54mm Bore - NX-40009

  • Part #: 131682S
  • Manufacturer Part #: NX-40009

MSRP Price: $66.95

Our Price: $60.26

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$6.69 (10%)
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Overview of Namura Piston Assembly - 54mm Bore - NX-40009

  • 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


  • NOTE: Ceramic composite cylinder; cylinder sleeving or replating required for oversizes

Specs for Namura Piston Assembly - 54mm Bore - NX-40009

Bore Size 54 mm
Type Piston Assembly
Type - Pistons & Piston Rings Piston w/Ring Set
Units Each
Weight 0.40 lbs

Specs for Namura Piston Assembly - 54mm Bore - NX-40009

Bore Size 54 mm
Type Piston Assembly
Type - Pistons & Piston Rings Piston w/Ring Set
Units Each
Weight 0.40 lbs

Fitment for Namura Piston Assembly - 54mm Bore - NX-40009

See if this part fits your ride

Part 131682S fits the following machines

Yamaha
  • 2015 Yamaha YZ125
  • 2014 Yamaha YZ125
  • 2013 Yamaha YZ125
  • 2012 Yamaha YZ125
  • 2011 Yamaha YZ125
  • 2010 Yamaha YZ125
  • 2009 Yamaha YZ125
  • 2008 Yamaha YZ125
  • 2007 Yamaha YZ125
  • 2006 Yamaha YZ125
  • 2005 Yamaha YZ125
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Instructions and Manuals for Namura Piston Assembly - 54mm Bore - NX-40009