NAMURA TECHNOLOGIES FX-40037AA Standard Piston Kit 76.96MM 77MM

( Brand: Namura Technologies ), ( Manufacturer Part Number: FX-40037AA ), ( Part Type: Piston ), ( Country Of Origin: Taiwan )

Review NAMURA TECHNOLOGIES Standard Bore Piston Kit Size 76.96mm For Yamaha 77mm fits WR250F 2015–2019

Introducing the Namura FX-40037AA Standard Piston Kit, specifically designed for Yamaha WR250F motorcycles manufactured between 2015 and 2019. This piston kit is engineered to replace the original pistons, ensuring optimal engine performance for your adventure bike.

Measuring 76.96mm in diameter and designed for a 77mm stroke, this piston kit is meticulously crafted to provide a perfect fit for your Yamaha WR250F. Each piston is manufactured using high-quality aluminum alloy, ensuring durability, strength, and lightweight properties. The piston crowns are treated with a superior coating for enhanced heat resistance and reduced friction, resulting in improved combustion efficiency and reduced engine heat.

The piston rings included in the kit are designed to provide a snug fit in the cylinder bore, ensuring optimal seal and preventing any unwanted leakage of engine gases. The rings are made of a high-performance material, ensuring a long service life and minimal wear.

The piston kit also includes new piston pins, which are essential for the proper functioning of the piston inside the engine. These pins are made of high-strength material and are precision machined to ensure a perfect fit and minimal play.

When installing the new piston kit, it is recommended to also replace the piston pin bushings to ensure a proper fit and prevent any unwanted vibrations. The kit includes new piston pin bushings that are specifically designed for the Yamaha WR250F.

In conclusion, the Namura FX-40037AA Standard Piston Kit provides an excellent upgrade for your Yamaha WR250F. With its high-quality materials, precision engineering, and perfect fit for your motorcycle, you can expect improved engine performance, reliability, and longevity. Trust Namura to deliver a top-notch piston kit that will enhance your riding experience.

Buying the Namura FX-40137AA Standard Piston Kit for a Yamaha WR250F (2015-2019, 77mm) can offer several benefits and drawbacks, depending on your specific needs and circumstances. Here are some potential pros and cons:

1. Performance Improvement: The piston kit is designed to provide better performance by increasing the bore size, leading to improved power and torque.

2. Durability: High-quality pistons can last longer than stock ones, reducing the frequency of engine rebuilds.

3. Customization: Upgrading the pistons is a popular modification for off-road riders looking to improve their bike's performance.

1. Cost: The piston kit is more expensive than stock parts, which may not be within everyone's budget.

2. Installation Complexity: Installing the piston kit requires advanced mechanical skills and specialized tools.

3. Potential Power Increase: Depending on your riding style and preferences, you may not need the increased power that comes with this upgrade.

In conclusion, whether or not the Namura FX-40137AA Standard Piston Kit is a good investment depends on your specific riding goals, budget, and mechanical abilities. If you're an off-road rider looking for increased power and durability, this upgrade could be worth considering. However, if you're a casual rider or not confident in your mechanical abilities, it might be best to stick with stock parts. Ultimately, the decision is yours to make.

Recommendation: If you're considering this upgrade, make sure to do thorough research, consult with experienced mechanics, and weigh the pros and cons carefully before making a purchase. Additionally, ensure that you have the necessary tools and skills to install the kit safely and effectively.

Details:

Namura FORGED Series piston. Made in Taiwan. Manufactured by Namura. Namura exclusive forged alloy used offers lower expansion rates, allowing for tighter build tolerances and superior tensile strength at operating temperatures.

Size A piston is 76.96mm. Kit is for standard bore size - 77.00mm. 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. Kit Includes piston, rings, pin clips you get exactly what is pictured.

Compatible with Yamaha model's below: 2015 WR250F.

part #: fx40037aa price

• $109.95

specifications pistondon:

• for models: Wr250f
• for makes: Yamaha
• for years: 2015-2019
• brand: Namura Technologies
• mpn: Fx-40037aa
• part type: Piston
• country of origin: Taiwan

shipping pistondon:

• type: Fixed
• service: Standard
• transit: 2-5 Days
• class: Standard
• cost: $0.00

seller pistondon:

• rating: 99.8%
• city: Suamico, Wisconsin
• # reviews: 412366

returns pistondon:

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

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
• started: March 30, 2026
• availability: In Stock

payments pistondon:

• other
• credit card: Discover
• wallet: Apple-pay

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