NAMURA TECHNOLOGIES FX-40045-BB Standard Piston Kit 94.96MM 95MM

( Brand: Namura Technologies ), ( Manufacturer Part Number: FX-40045-BB ), ( Part Type: Piston )

Review NAMURA TECHNOLOGIES Standard Bore Piston Kit Size 94.96mm For Yamaha 95mm fits WR450F 2003–2015

Introducing the Namura FX-40045-BB Standard Piston, an essential upgrade for Yamaha WR450F motorcycles manufactured between 2003 and 2015. This piston is designed specifically for engines with a 95mm stroke, making it an ideal replacement or performance enhancement for those bikes.

The FX-40045-BB piston is meticulously crafted from high-quality forged aluminum alloy. Forged pistons offer superior strength and durability compared to their cast counterparts, ensuring reliable operation even under the most demanding conditions. The piston's top ring groove measures 94.96mm, making it a perfect fit for the WR450F's engine.

This piston features a standard dome shape, providing optimal compression for the WR450F's engine. The piston's skirt is designed with a thin, lightweight profile to minimize frictional losses and improve engine efficiency. The piston's ring lands are engineered for precise ring contact, ensuring proper seal and preventing oil leakage.

The piston comes as part of a complete 95mm kit, which includes not only the piston but also other essential components such as the piston pin, piston pin retainer, and piston rings. This kit offers a convenient and cost-effective solution for those in need of a piston replacement or upgrade.

When installing the Namura FX-40045-BB piston, it is important to follow the manufacturer's instructions carefully to ensure proper fitment and installation. Proper installation will help ensure the longevity of the piston and the overall performance of the engine.

In summary, the Namura FX-40045-BB Standard Piston is an excellent choice for Yamaha WR450F owners looking for a reliable and durable replacement piston or an upgrade for improved engine performance. Its high-quality materials, precise engineering, and complete 95mm kit make it an essential addition to any WR450F motorcycle.

Pros and Cons of Buying a Namura FX-40145-BB Standard Piston Kit for Yamaha WR450F (2003-2015)

The Namura FX-40145-BB standard piston kit is designed for Yamaha WR450F motorcycles from the years 2003 to 2015. This kit includes a 94.96mm piston, which is a 0.1mm oversize compared to the stock 95mm piston. In this article, we will discuss the potential advantages and disadvantages of purchasing this piston kit.

1. Wear and Tear: Over time, the stock piston may wear out. Replacing it with an aftermarket kit like the Namura FX-40145-BB can help improve the engine's performance and reliability.

2. Power Gain: The oversized piston kit can provide a power gain due to increased compression. This may result in improved acceleration and overall performance.

3. Durability: Namura is a reputable brand in the motorcycle aftermarket industry. The FX-40145-BB piston kit is likely to be well-manufactured and durable, ensuring long-lasting performance.

1. Cost: Aftermarket piston kits like the Namura FX-40145-BB can be more expensive than stock parts. The additional cost may not be justifiable for some riders, especially those who are not looking for significant power gains.

2. Installation Complexity: Installing an aftermarket piston kit requires specialized knowledge and tools. It's essential to ensure that the installation is done correctly to avoid potential engine damage.

3. Engine Tuning: Installing an oversized piston kit may require additional engine tuning to ensure proper engine operation. This can add to the overall cost and complexity of the project.

The Namura FX-40145-BB standard piston kit for Yamaha WR450F motorcycles (2003-2015) offers several advantages, such as improved performance, enhanced durability, and potential power gains. However, it also comes with some disadvantages, including higher cost, installation complexity, and potential engine tuning requirements.

If you are looking to improve the performance and reliability of your Yamaha WR450F motorcycle and are willing to invest time, money, and expertise into the project, then the Namura FX-40145-BB standard piston kit could be an excellent choice. However, if you are on a tight budget or not looking for significant power gains, it might be more cost-effective to stick with the stock piston. Always consult with a professional mechanic or a trusted aftermarket parts supplier before making a decision.

Details:

Kit is for standard bore size - 95.00mm. 12.5:1 Compression Ratio. Kit Includes piston, rings, pin clips you get exactly what is pictured. Namura exclusive forged alloy used offers lower expansion rates, allowing for tighter build tolerances and superior tensile strength at operating temperatures.

Made in Taiwan. All Namura Forged pistons come with Namura signature features: 100% CNC-machine piston domes, hard anodized domes for reduced carbon build-up and heat resistance M0S2 coated skirts excellent break-in protection properties. Manufactured by Namura. Namura FORGED Series piston.

Size B piston is 94.96mm.

part #: fx40045 prices

• $125.99-$190.36

specifications pistondon:

• for models: Wr450f
• for makes: Yamaha
• for years: 2003-2015
• brand: Namura Technologies
• mpn: Fx-40045-bb
• part type: Piston

shipping pistondon:

• class: Standard
• transit: 5-8 Days
• type: Fixed
• service: Standard
• cost: $0.00

general pistondon:

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

offer pistondon:

• availability: In Stock
• sold: 0
• quantity: 4
• options: Ship-to-home
• started: August 28, 2025

returns pistondon:

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

seller pistondon:

• rating: 99.3%
• # reviews: 388250
• city: Suamico, Wisconsin

payments pistondon:

• other
• credit card: Diners-club
• wallet: Paypal

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