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Piston Assembly - 66.4mm Bore - NX-20029

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Piston Assembly - 66.4mm Bore - NX-20029

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MSRP: $89.95

Price: $71.96 20% off!
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Namura Piston Assembly - 66.4mm Bore - NX-20029
  • 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: Nikasil Bore; cylinder sleeving or replating required for oversizes
Part #: 131670S
Mfg #: NX-20029
Bore Size 66.4 mm
Type Piston Assembly
Type Piston w/Ring Set
Units Each
Weight 0.75 lbs
Fitment for Namura Piston Assembly - 66.4mm Bore - NX-20029

Part 131670S fits the following machines

  • KX250 2005-2007
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5.0 / 5.0
1 Review
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1 Star
Good Piston
Great product. Inexpensive and got me riding again.
This is my 4th time using their pistons this year. I will continue to use.
February 29, 2012