1. Pistons, Rings & Piston Kits Products
  2. sku: 8403711590319563
  3. NAMURA NA-10003

NAMURA NA-10003 Piston

fits model: Xr400r, Std. make: Honda. year: 1996–2004.

Na-10003 Namura Motorcycle Std Piston For Honda Xr400r 1996-2004

( Brand: Namura ), ( Manufacturer Part Number: NA-10003 ), ( Type: Piston ), ( Items Included: Piston Rings, Wrist Pin ), ( Piston Diameter: 84.97 Mm )

Review NAMURA Motorcycle Piston For Honda fits XR400R STD 1996–2004

Introducing the Namura NA-10003 Standard Piston, an ideal replacement option for the piston of Honda XR400R motorcycles manufactured between 1996 and 2004. This high-performance piston is engineered to deliver exceptional power and durability, ensuring optimal engine performance for your motorcycle.

The NA-10003 piston is meticulously crafted using advanced techniques and premium materials. Its forged construction ensures superior strength and rigidity, enabling it to withstand the rigors of off-road riding and racing. The piston's crown is designed with a smooth, polished finish to minimize friction and improve engine efficiency.

This piston features a compression height of 31.5mm and a total height of 54.5mm. Its ring grooves are designed to accommodate standard piston rings, and the piston pin bore measures 19.5mm. The piston's skirt is designed with a generous gudgeon pin bore diameter of 23.5mm, ensuring a reliable and secure fit with the crankshaft.

The NA-10003 piston is also designed to be compatible with OEM piston rings, making the installation process straightforward and hassle-free. Moreover, it comes with a precise piston-to-pin clearance, ensuring a snug fit and minimizing the risk of piston slap.

By upgrading to the Namura NA-10003 Standard Piston, you can expect increased horsepower and torque, improved combustion efficiency, and enhanced overall engine performance. This piston is an excellent choice for riders who demand the best from their motorcycle and are looking to take their off-road riding experience to the next level.

In conclusion, the Namura NA-10003 Standard Piston is a high-quality, high-performance replacement option for the piston of Honda XR400R motorcycles manufactured between 1996 and 2004. Its advanced design, premium materials, and meticulous construction make it an excellent choice for riders who demand the best from their motorcycle and are looking to maximize engine performance and durability.

The Namura NA-10003 Standard piston is a popular aftermarket piston option for the Honda XR400R model years 1996-2004. This piston is known for its high-performance features and potential benefits for the motorcycle. However, like any aftermarket part, it comes with its own advantages and disadvantages.

Advantages of Buying Namura NA-10003 Standard Piston for Honda XR400R:

1. Enhanced Power: The Namura NA-10003 piston is designed to provide increased power and torque due to its higher compression ratio. This can lead to better acceleration and improved overall performance.

2. Durability: The forged piston design of the Namura NA-10003 piston is known for its strength and durability, which can help extend the lifespan of the engine.

3. Precision Manufacturing: The piston is manufactured using advanced technology and precise machining techniques, ensuring a superior fit and finish.

Disadvantages of Buying Namura NA-10003 Standard Piston for Honda XR400R:

1. Cost: The Namura NA-10003 piston is a premium aftermarket part, and its price may be higher than the original equipment manufacturer (OEM) piston.

2. Installation Complexity: Installing the Namura NA-10003 piston may require more time and expertise compared to an OEM piston due to its performance-oriented features.

3. Potential Compatibility Issues: Depending on the condition of the existing engine components, the Namura NA-10003 piston may not be compatible with every Honda XR400R. It is crucial to ensure that the engine is in good condition before installing the aftermarket piston.

Conclusion:

The Namura NA-10003 Standard piston offers several advantages, such as enhanced power, durability, and precision manufacturing, making it an attractive option for those looking to improve the performance of their Honda XR400R. However, it comes with some disadvantages, such as a higher cost, installation complexity, and potential compatibility issues. Ultimately, the decision to purchase the Namura NA-10003 Standard piston depends on an individual's priorities, budget, and technical expertise. If the rider values performance enhancements and is willing to invest in a high-quality aftermarket part, the Namura NA-10003 Standard piston may be a worthwhile investment. On the other hand, if the rider prioritizes affordability and ease of installation, an OEM piston may be a better choice.

Details:

Product Features Anodized piston head increases strength and heat dissipation. Shipping: Items are shipped within a timely manner. All components are manufactured to OE-specs. Fits:Make: model: Year: HondaXR400R 1996 -2004.

Specifications: Part: Piston, Size: 84.97mm, Oversize: Std, Piston Type: Cast. MOST Namura pistons feature a machined head which helps reduce carbon build-up and reflect heat. CRU Products was started by Cycles R Us in 2009. Combined shipping is available for multiple items.

part #: na10003 prices

  • $77.00-$105.68

specifications pistondon:

  • for models: Xr400r, Std
  • for makes: Honda
  • for years: 1996-2004
  • brand: Namura
  • mpn: Na-10003
  • type: Piston
  • items included: Piston Rings, Wrist Pin
  • piston diameter: 84.97 Mm

offer pistondon:

  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • started: October 9, 2025
  • quantity: 4

returns pistondon:

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

shipping pistondon:

  • type: Fixed
  • class: Standard
  • cost: $0.00
  • transit: 2-7 Days
  • service: Standard

general pistondon:

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

seller pistondon:

  • rating: 99.7%
  • city: Chippewa Lake, Ohio
  • # reviews: 104099

payments pistondon:

  • other
  • wallet: Paypal
  • credit card: Mastercard
for models: xr400r, std, for makes: honda, for years: 1996-2004, type: piston, items included: piston rings, wrist pin, piston diameter: 84.97 mm,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 8403711590319563,

Namura NA-10003 Is Similar To:

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5 offers $77.00–$105.68 USD
  • Offer #1: $79.95 price + $0.00 shipping estimate = $79.95* total. Namura piston and rings kits feature smooth piston heads for better fuel efficiency, hard anodized crowns making them 75% stronger than non-anodized pistons, a MOS2 Teflon/Molydbenum coating giving them high durability and lubricity, and they are made to exact OEM specifications.FREE SHIPPING
  • Offer #2: $77.00 price + $0.00 shipping estimate = $77.00* total. high compression. standard bore.FREE SHIPPING
  • Offer #3: $105.68 price + $0.00 shipping estimate = $105.68* total. Namura Top End Gasket Sets are precision cut Klingersil coated steel head gaskets for better sealing and high-temp resistance. NAMURA TOP END REPAIR KIT.FREE SHIPPING
  • Offer #4: $126.86 price + $0.00 shipping estimate = $126.86* total. Color 0.50mm Oversize to 85.47mm, 11:1 Hi-Compression. Namura -2K Piston Kit 0.50mm Oversize to 85.47mm, 11:1 Hi-Compression.FREE SHIPPING
  • Offer #5: $79.48 price + $0.00 shipping estimate = $79.48* total. The Namura -2 is an oversized piston kit (+0.50 mm) specifically engineered for the Honda 400cc engine family Honda TRX400EX Sportrax / FourTrax: 1999 2008.FREE SHIPPING

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