NAMURA ORNA-RA425059-GS Piston Rings Bike 77.96MM

( Brand: Namura ), ( Manufacturer Part Number: ORNA-RA425059-GS ), ( Part Type: Ring Piston )

Review NAMURA Honda Dirt Bike Piston Rings 77.96mm fits 250X CRF 2004–2013

Introducing the Namura OR-A425059-GS piston rings for the Honda CRF 250X motorcycle, specifically designed for engines with a piston bore size of 77.96mm and manufactured between the years 2004 and 2013. These piston rings are an essential component in the engine's combustion process, ensuring a proper seal between the piston and cylinder wall for optimal engine performance.

The Namura piston rings are made from high-quality materials, ensuring durability and longevity. The rings are precision engineered to fit perfectly into the engine, minimizing the need for modifications or adjustments during installation. The rings are also designed to work seamlessly with the engine's existing components, ensuring a smooth and efficient combustion process.

The top ring in this set is designed to control the compression and sealing of the combustion chamber. The second ring, the compression ring, is responsible for compressing the air-fuel mixture during the combustion process. The oil control ring, which is the third ring in the set, helps prevent oil from leaking into the combustion chamber, ensuring that the engine remains lubricated while maintaining optimal compression.

These piston rings are designed with a precise ring land width and ring groove depth, ensuring a perfect seal between the piston and cylinder wall. The rings are also heat-treated to ensure they can withstand the high temperatures generated during the combustion process.

Installing these piston rings is a straightforward process, but it is important to follow the manufacturer's instructions carefully to ensure proper installation and to avoid any potential damage to the engine. If you are unsure about the installation process, it is recommended that you consult with a professional mechanic or Honda dealership.

In conclusion, the Namura OR-A425059-GS piston rings for the Honda CRF 250X motorcycle are a high-quality, precision-engineered component designed to ensure optimal engine performance and longevity. These rings are specifically designed for engines with a piston bore size of 77.96mm and manufactured between the years 2004 and 2013. With their high-quality materials, precise engineering, and easy installation, these piston rings are an excellent investment for any Honda CRF 250X motorcycle owner.

Buying Namura ORNA-RA425059-GS piston rings for a 2004-2013 Honda CRF 250X bike involves considering several factors before making a decision. Here are some pros and cons that might help in reaching a conclusion.

1. OEM Quality: Namura is a well-known aftermarket manufacturer that produces high-quality piston rings. These rings are designed to meet the original equipment specifications of Honda CRF 250X.

2. Durability: The rings are made from high-temperature alloy steel, ensuring they can withstand the extreme conditions inside the engine. This results in longer ring life and improved engine performance.

3. Precision: The rings are manufactured using advanced CNC machining technology, ensuring they are accurately sized and have consistent dimensions. This results in a proper seal between the piston and the cylinder wall, preventing oil leaks and improving engine compression.

1. Cost: Aftermarket piston rings, like those from Namura, can be more expensive than OEM rings. However, the increased cost may be offset by the improved engine performance and longevity.

2. Installation: Installing aftermarket piston rings can be more complex than installing OEM rings. It may require specialized tools and skills. It's essential to follow the manufacturer's instructions carefully to ensure proper installation.

3. Break-in Period: After installing new piston rings, it's essential to allow for a break-in period. This period can last up to 500 miles, during which the rings need to be run-in under specific conditions to ensure they seat properly and form an effective seal.

Namura ORNA-RA425059-GS piston rings for a 2004-2013 Honda CRF 250X bike offer several advantages, such as OEM quality, durability, and precision. However, they come with a higher cost, a more complex installation process, and a break-in period. Ultimately, if you're looking for high-performance piston rings that can withstand the rigors of off-road riding, Namura rings might be an excellent investment.

If you're considering purchasing Namura ORNA-RA425059-GS piston rings for your Honda CRF 250X bike, make sure to order the correct size and follow the installation instructions carefully. It's also recommended to have the necessary tools and skills to install the rings or to seek professional help from a qualified mechanic. If you're unsure about the installation process, it might be worth considering having the rings installed by a professional to ensure proper installation and to avoid any potential damage to the engine.

Details:

Parts without fitment are to be assumed universal and may require vehicle modification.: Brand: Namura, model Number: ORNA-RA425059-GS. I need to exchange an item. This is helpful if you are buying multiple items.

Compatibility: Honda CRF250X 2004 - 2009, 2012 2013 , CRF250R 2009. This Namura ring set does NOT fit OEM pistons. 2004 - 2013 Honda CRF 250X Dirt Bike Namura Piston Rings 77.96mm: Ring Set Contains: ring to match a single piston. Piston Size: 77.96 - 77.98mm.

part #: ornara425059 price

• $34.33

specifications pistondon:

• for models: 250x, Crf
• for makes: Honda
• for years: 2004-2013
• brand: Namura
• mpn: Orna-ra425059-gs
• part type: Ring Piston

shipping pistondon:

• service: Standard
• transit: 3-7 Days
• type: Fixed
• class: Standard
• cost: $0.00

seller pistondon:

• city: Boise, ID
• rating: 99.8%
• # reviews: 75540

payments pistondon:

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

general pistondon:

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

offer pistondon:

• started: January 19, 2026
• options: Ship-to-home
• quantity: 3
• sold: 0
• availability: In Stock

returns pistondon:

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

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