1. Pistons, Rings & Piston Kits Products
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  3. NAMURA MN/9JQY

NAMURA TECHNOLOGIES MN-9JQY Piston Kit Engine Ak MN/9JQY

fits model: Yz450f. make: Yamaha. year: 2003–2009.

9jqy Namura Technologies Mn/9jqy Piston Kit For 2003-2009 Yamaha Yz450f - Engine Pistons Kits Ak

( Brand: Namura Technologies ), ( Manufacturer Part Number: MN/9JQY ), ( Type: Piston Kit ), ( Compatible Year: 2009 2008 2007 2006 2005 2004 2003 ), ( Bundle Description: 1 Pc Genuine Namura Piston Kit ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review NAMURA TECHNOLOGIES Mn/9jqy Piston Kit For Yamaha Engine Pistons Kits Ak fits YZ450F 2003–2009

Introducing the Namura MN/9JQY piston kit, specifically designed for the Yamaha YZ450F engines manufactured between 2003 and 2009. This high-performance piston kit is engineered to deliver exceptional power and reliability, making it an excellent choice for racers and enthusiasts seeking to maximize their engine's potential.

The MN/9JQY piston kit includes two forged pistons, each crafted from a high-strength alloy to ensure durability and robustness under the most demanding racing conditions. These pistons feature a unique design with a low compressive height and a narrow piston pin diameter, ensuring optimal engine performance and increased power output.

The piston crown is engineered with a high-tech coating that reduces friction and heat transfer, enabling the engine to operate more efficiently and maintain optimal operating temperatures. This coating also provides enhanced durability, reducing the risk of scuffing or other damage that can negatively impact engine performance.

The piston kit also includes new piston pins, which are precision machined from chrome-molybdenum steel and feature a phosphate coating for added strength and durability. The piston pin's low-friction coating ensures smooth operation and reduces wear on the connecting rods.

The Namura MN/9JQY piston kit also includes new rings a compression ring, an oil control ring, and a skirt oil scraper ring. These rings are manufactured from high-quality materials and are designed to provide improved sealing and reduced engine blow-by, resulting in increased power and efficiency.

Installing the Namura MN/9JQY piston kit is a straightforward process, as it includes all necessary hardware, including new piston pin bushings and ring gap tools. The kit is also backed by Namura's industry-leading warranty, providing peace of mind and confidence in your investment.

In summary, the Namura MN/9JQY piston kit is a premium, high-performance solution for Yamaha YZ450F engines from 2003 to 2009. It delivers exceptional power, durability, and reliability, making it the go-to choice for racers and enthusiasts seeking to maximize their engine's potential.

The Namura MN/9JQY piston kit for the 2003-2009 Yamaha YZ450F engine is a popular aftermarket option for those seeking performance upgrades. Here are some pros and cons to consider before making a purchase.

Pros:

1. Enhanced Performance: The Namura piston kit is designed to provide increased power and torque, making the engine more responsive and aggressive.

2. Durability: The piston kit is made of high-quality materials, including forged pistons and durable rings, ensuring long-lasting performance.

3. Customizability: Namura offers different piston designs to suit various riding styles and power goals, allowing riders to tailor the kit to their specific needs.

4. Improved Thermal Efficiency: The piston kit is designed to improve the engine's thermal efficiency, reducing heat build-up and improving overall engine performance.

5. Cost-Effective: Compared to other aftermarket piston kits, the Namura MN/9JQY kit is relatively affordable, making it an attractive option for many riders.

Cons:

1. Installation: Installing the piston kit requires a certain level of mechanical expertise, and improper installation could result in engine damage.

2. Potential Power Roll-On: Some riders have reported experiencing power roll-on, or a momentary loss of power, after installing the Namura piston kit.

3. Noise Level: The piston kit can increase the noise level of the engine, which some riders may find bothersome.

4. Required Maintenance: The piston kit may require more frequent maintenance than stock pistons, including regular ring checks and oil changes.

Conclusion:

The Namura MN/9JQY piston kit for the 2003-2009 Yamaha YZ450F engine offers several benefits, including improved performance, durability, and customizability. However, it also comes with some potential drawbacks, such as the need for professional installation and increased noise level. Ultimately, the decision to purchase this piston kit depends on the rider's individual goals, budget, and mechanical expertise.

Recommendation:

If you're looking to improve the performance of your Yamaha YZ450F and have the necessary mechanical skills and resources, the Namura MN/9JQY piston kit could be an excellent investment. However, if you're unsure about your mechanical abilities or are concerned about the potential drawbacks, it may be worth considering other options or seeking professional advice before making a purchase.

Details:

Namura Piston Kit for 2003 - 2009 Yamaha YZ450F - Engine Pistons Kits ak: Status: In Stock.

part #: mn9jqy price

  • $147.38

specifications pistondon:

  • for models: Yz450f
  • for makes: Yamaha
  • for years: 2003-2009
  • brand: Namura Technologies
  • mpn: Mn/9jqy
  • type: Piston Kit
  • compatible year: 2009 2008 2007 2006 2005 2004 2003
  • bundle description: 1 Pc Genuine Namura Piston Kit
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement

returns pistondon:

  • paid by: Seller
  • time: 30 Days
  • policy: Returns Accepted

shipping pistondon:

  • transit: 3-6 Days
  • class: Standard
  • type: Fixed
  • service: Standard
  • cost: $0.00

payments pistondon:

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general pistondon:

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

offer pistondon:

  • quantity: 1
  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • started: May 10, 2026

seller pistondon:

  • rating: 99.2%
  • city: Multiple warehouses
  • # reviews: 22503
for models: yz450f, for makes: yamaha, for years: 2003-2009, type: piston kit, compatible year: 2009 2008 2007 2006 2005 2004 2003, bundle description: 1 pc genuine namura piston kit, core charge: free no core charge, fitment type: direct replacement,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 12299225243775633,

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