1. Pistons, Rings & Piston Kits Products
  2. sku: 8940722061980722
  3. NAMURA NA-40004-4

NAMURA NA-40004-4 Piston M-001

fits model: Xtz660, Tenere. make: Yamaha. year: 1991–1998.

Na-40004-4 Namura M-001 Piston For Yamaha Xtz660 Tenere 1991-1998 1 Bore

( Brand: Namura ), ( Manufacturer Part Number: NA-40004-4 ), ( Type: Piston ), ( Ships From: Usa ), ( Oem Or Performance: Performance/aftermarket ), ( Piston Diameter: 100.97 Mm ), ( Handling Time: Approximately 1 Business Day )

Review NAMURA Piston For Yamaha Bore fits TENERE XTZ660 1991–1998

Introducing the Namura NA-40004-4 M-001 piston, a top-tier replacement option for the Yamaha XTZ660 Tenere motorbikes manufactured between 1991 and 1998. This piston is meticulously engineered to deliver exceptional performance, reliability, and durability.

The core of this piston is a high-strength forged aluminum alloy construction. This not only ensures a perfect fit but also provides unparalleled strength and resistance to engine stress. The piston crown is designed with a high compression finish, which allows for increased power output from the engine. The skirt of the piston is coated with a thermal barrier coating that reduces heat transfer, ensuring optimal engine efficiency and longevity.

The piston ring set includes a compression ring, an oil control ring, and a groove-type piston ring. These rings are made of high-quality materials and are precision machined to ensure a perfect seal and optimal compression. The groove-type piston ring is designed to reduce friction and improve engine performance.

The piston pin is made of chrome molybdenum steel, ensuring a strong connection between the piston and the connecting rod. The pin is also surface treated for added durability and resistance to wear. The piston pin retaining clip is made of high-strength steel and is designed to securely hold the piston pin in place.

This piston kit also includes a piston pin bore honing tool. This tool is used to ensure a precise fit of the piston in the engine cylinder. The tool includes detailed instructions for use, making it easy for any mechanic or enthusiast to use.

In summary, the Namura NA-40004-4 M-001 piston is a top-quality replacement option for the Yamaha XTZ660 Tenere motorbikes from 1991 to 1998. Its high-strength forged aluminum alloy construction, high-compression finish, and thermal barrier coating ensure optimal engine performance, efficiency, and durability. The high-quality piston ring set and piston pin, along with the included piston pin bore honing tool, make this piston kit an excellent value for any motorbike enthusiast.

The Namura NA-40004-4 M-001 piston is a replacement option for the Yamaha XTZ660 Tenere motorcycles manufactured between 1991 and 1998. Here are some potential pros and cons of buying this piston.

Pros:

1. OEM Equivalent: Although not an original equipment manufacturer (OEM) piston, the Namura piston is designed to be an equivalent replacement, ensuring a proper fit and function.

2. Affordable: Compared to OEM pistons, aftermarket options like the Namura piston can be significantly more affordable.

3. Availability: Aftermarket parts like the Namura piston are often more readily available than OEM pistons, making it easier to find a replacement when needed.

Cons:

1. Quality Concerns: Some aftermarket parts, including pistons, may not meet the same quality standards as OEM parts. However, reputable manufacturers like Namura generally strive to maintain high-quality standards.

2. Wear and Tear: Replacing a piston indicates that other components in the engine may also require attention, which could result in additional costs.

3. Installation: Installing aftermarket parts may require additional effort and expertise compared to OEM parts.

Conclusion:

The Namura NA-40004-4 M-001 piston is a viable option for those looking to replace a worn-out piston in their Yamaha XTZ660 Tenere motorcycle from 1991 to 1998. While it may not be an OEM part, it is designed to be an equivalent replacement and can offer cost savings compared to OEM options. However, potential buyers should be aware of the possible quality concerns and the need for additional engine maintenance that may result from replacing the piston.

Recommendation:

If you are in need of a piston replacement for your Yamaha XTZ660 Tenere, the Namura NA-40004-4 M-001 piston can be a cost-effective solution. Ensure that you purchase the piston from a reputable dealer to minimize the risk of quality issues. Additionally, consider having the piston installed by a professional mechanic to ensure proper installation and to address any potential engine-related issues.

Details:

Namura Piston For YAMAHA XTZ660 TENERE 1991 1998 1 Bore NA-40004-4. Shipped with USPS Ground Advantage. Condition is New.

part #: na400044 prices

  • $87.24-$99.41

specifications pistondon:

  • for models: Xtz660, Tenere
  • for makes: Yamaha
  • for years: 1991-1998
  • brand: Namura
  • mpn: Na-40004-4
  • type: Piston
  • ships from: Usa
  • oem or performance: Performance/aftermarket
  • piston diameter: 100.97 Mm
  • handling time: Approximately 1 Business Day

payments pistondon:

  • credit card: Mastercard
  • wallet: Google-pay
  • other

returns pistondon:

  • policy: No Returns

shipping pistondon:

  • service: USPS Ground Advantage
  • type: Calculated
  • cost: $7.67
  • carrier: USPS
  • class: Standard
  • transit: 2-6 Days

general pistondon:

  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
  • condition: New

seller pistondon:

  • city: Moweaqua, Illinois
  • rating: 100.0%
  • # reviews: 129

offer pistondon:

  • started: November 19, 2025
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • quantity: 1
for models: xtz660, tenere, for makes: yamaha, for years: 1991-1998, type: piston, ships from: usa, oem or performance: performance/aftermarket, piston diameter: 100.97 mm, handling time: approximately 1 business day,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 8940722061980722,

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