NAMURA TECHNOLOGIES NA-10003-4MX Piston Kit .040 86MM

( Brand: Namura Technologies ), ( Manufacturer Part Number: NA-10003-4MX ), ( Part Type: Piston )

Review NAMURA TECHNOLOGIES .040 Over Bore Piston Kit For Honda Fits 86mm Na-10003-4 fits XR400R 1996–2004

The Namura NA-10003-4MX 040 Piston Kit is specifically designed for Honda XR400R motorcycles manufactured between 1996 and 2004 with an 86mm bore size. This kit is an excellent choice for riders who are looking to upgrade their engine components or rebuild their engine.

The pistons in this kit are made from high-quality forged aluminum alloy. Forged pistons offer superior strength and durability compared to cast pistons. They are also more resistant to distortion and fracturing, making them ideal for high-performance applications. Each piston is precision-machined to ensure a perfect fit and optimal engine performance.

The piston kit includes four new pistons, four piston rings, and four piston pins. The piston rings are made from high-tensile, heat-resistant materials to ensure a tight seal between the piston and cylinder wall. The piston pins are made from chrome-molybdenum steel, which offers excellent strength and resistance to wear.

This kit is also designed to enhance the power output of your XR400R engine. The pistons have a compression height that is optimized for improved combustion efficiency and increased horsepower. The pistons are also designed to reduce friction, which can lead to better fuel economy and longer engine life.

The installation process for this piston kit is relatively straightforward, but it is recommended that the installation be performed by a professional mechanic. The kit comes with detailed instructions to guide the installation process, and it is important to follow these instructions carefully to ensure proper installation and optimal engine performance.

In conclusion, the Namura NA-10003-4MX 040 Piston Kit is an excellent upgrade for Honda XR400R motorcycles manufactured between 1996 and 2004 with an 86mm bore size. The kit includes high-quality forged aluminum pistons, piston rings, and piston pins that offer superior strength, durability, and performance. By upgrading to this piston kit, riders can expect improved engine power, reduced friction, and extended engine life.

The Namura NA-10003-4MX 040 piston kit is a popular aftermarket option for the Honda XR400R motorcycles manufactured between 1996 and 2004 with an 86mm bore. This piston kit comes with several advantages and disadvantages that are essential to consider before making a purchase.

1. Enhanced Performance: The pistons in this kit are designed to provide better compression ratio and increased power output, leading to improved engine performance.

2. Durability: The pistons are made from high-quality, forged material, which makes them more durable and resistant to wear and tear than the OEM pistons.

3. Customization: This kit offers a higher level of customization, allowing riders to tailor the performance of their motorcycle to their specific riding style and preferences.

1. Cost: The Namura piston kit is more expensive than the OEM pistons, which may be a significant deterrent for some riders.

2. Installation: Installing aftermarket pistons requires a high level of expertise and specialized tools, which may add to the overall cost of the project.

3. Compatibility: It is crucial to ensure that the piston kit is compatible with the specific year and model of the XR400R to avoid any potential issues.

In conclusion, the Namura NA-10003-4MX 040 piston kit offers several advantages, including enhanced performance, durability, and customization. However, it also comes with some disadvantages, such as a higher cost, the need for specialized installation, and potential compatibility issues. Ultimately, the decision to purchase this piston kit depends on the individual rider's priorities, budget, and experience level.

If you are a confident DIYer with a good understanding of motorcycle engine mechanics and a significant budget, this piston kit could be an excellent investment to unlock the full potential of your Honda XR400R. However, if you are unsure of your abilities or have limited resources, it may be worth considering other options, such as upgraded OEM pistons or other performance modifications.

Details:

Piston dome is anodized for superior heat resistance and longer lifespan. Kit includes piston, rings, pin, clips you get exactly what is pictured. Manufactured by Namura. Kit is for .040 over bore size - 86.00mm.

Made in Taiwan. Compatible with Honda model's that follow: 1996 XR400R. Piston skirts are Molybdenum Teflon coated to minimize resistance/wear and provide extended life. Piston is 85.97mm.

part #: na100034mx price

• $72.95

specifications pistondon:

• for models: Xr400r
• for makes: Honda
• for years: 1996-2004
• brand: Namura Technologies
• mpn: Na-10003-4mx
• part type: Piston

shipping pistondon:

• type: Fixed
• class: Standard
• service: Standard
• cost: $0.00
• transit: 4-7 Days

seller pistondon:

• rating: 99.4%
• city: Suamico, Wisconsin
• # reviews: 387223

payments pistondon:

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

offer pistondon:

• started: June 5, 2025
• availability: In Stock
• sold: 0
• quantity: 2
• options: Ship-to-home

returns pistondon:

• paid by: Buyer
• time: 60 Days
• policy: Returns Accepted

general pistondon:

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

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