SKU: 31079494481

Namura Piston Kit 39.96mm Dual Ring – Yamaha PW50 '81–'24

Sale price$101.69 Regular price$112.99
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Ships within 48 hours · Estimated delivery Sep 28 - Oct 3

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Description

Namura Piston Kit 39.96mm Dual Ring – Yamaha PW50 '81–'24Namura provides high quality piston options to suit a wide range of applications, including direct OEM replacements, high compression variants, and multiple oversizes. B (0. 01 mm) and C (0. 02 mm) oversizes are also available, helping to extend the service life of expensive plated cylinders. Select applications are supported with big bore piston kits. With the addition of MOS2 coating and hard anodising, Namura delivers improved performance and

Namura provides high-quality piston options to suit a wide range of applications, including direct OEM replacements, high-compression variants, and multiple oversizes. B (0.01 mm) and C (0.02 mm) oversizes are also available, helping to extend the service life of expensive plated cylinders. Select applications are supported with big-bore piston kits. With the addition of MOS2 coating and hard anodising, Namura delivers improved performance and durability, without the premium price.

Features:

  • MOS2 (Teflon/Molybdenum) Coated Skirts: Applied using a rolled-on process for a bond up to 10 times stronger than typical spray coatings. Improves heat transfer, reduces friction, and helps prevent cold seizures.
  • Machined Smooth Heads: Reflect combustion heat and minimise carbon build-up, protecting the piston crown. Testing indicates potential gains of up to 6% in horsepower and fuel efficiency.
  • Anodised Domes: Enhance heat resistance and durability, with up to 75% greater strength compared to non-anodised pistons.
  • Hypereutectic Casting Process: Increases silicon content to reduce expansion, improve wear resistance, and withstand higher cylinder temperatures.
  • 0.50 mm oversize up to 100.47 mm, with a 9.2:1 standard compression ratio.
  • Includes piston (individually wrapped), OEM-quality rings (boxed separately), wrist pin, and circlips.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 31079494481

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Reviewed in the United States on March 27, 2026
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Reviewed in the United States on July 7, 2024
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Reviewed in the United States on March 7, 2026
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Mrs D
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★★★★★ 5
Impressive
I bought this to help get rid of some dark spots on my face that usually comes with harsh winter temperatures I am a black woman with combination skin some parts oily other dry and uneven skin tone especially during winter months, I noticed a change after first use dark spots have gotten lighter and lighter with each use this review is 1 week of consistent use I am impressed. It does dry me out a bit but then I moisturize with Olay regenerist and I’m smooth as butter. I would recommend!
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Reviewed in the United States on January 15, 2024
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Janice M.
New York, US
★★★★★ 3
Packaging
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