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Namura Piston Assembly - 66.4mm Bore - NX-20029

  • Part #: 131670S
  • Manufacturer Part #: NX-20029

MSRP Price: $89.95

Our Price: $80.96

You Save:
$8.99 (10%)
Please select Bore Size
2 on Hand

Overview of 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

Specs for Namura Piston Assembly - 66.4mm Bore - NX-20029

Bore Size 66.4 mm
Type Piston Assembly
Type - Pistons & Piston Rings Piston w/Ring Set
Units Each
Weight 0.75 lbs

Specs for Namura Piston Assembly - 66.4mm Bore - NX-20029

Bore Size 66.4 mm
Type Piston Assembly
Type - Pistons & Piston Rings Piston w/Ring Set
Units Each
Weight 0.75 lbs

Fitment for Namura Piston Assembly - 66.4mm Bore - NX-20029

See if this part fits your ride

Part 131670S fits the following machines

Kawasaki
  • 2007 Kawasaki KX250
  • 2006 Kawasaki KX250
  • 2005 Kawasaki KX250
5.0 / 5.0
1 Review
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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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
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Instructions and Manuals for Namura Piston Assembly - 66.4mm Bore - NX-20029