NAMURA ORNA-RA424635-GS Piston Rings Bike 76.94MM

( Brand: Namura ), ( Manufacturer Part Number: ORNA-RA424635-GS ), ( Part Type: Ring Piston )

Review NAMURA Yamaha Dirt Bike Piston Rings 76.94mm fits WR250F 2005–2013

Namura OR-A424635-GS Replacement Piston Rings for Yamaha WR250F (2005-2013) with 76.94mm Bore

The Namura OR-A424635-GS piston rings are specifically engineered for the Yamaha WR250F motorcycles manufactured between 2005 and 2013. These rings sport a bore size of 76.94mm, ensuring a perfect fit for your engine.

These high-quality replacement piston rings are meticulously crafted to provide optimal engine performance and durability. The rings are designed to ensure a tight seal between the piston and the cylinder wall, preventing any unwanted combustion gases from escaping. This results in improved combustion efficiency, enhanced power output, and increased fuel economy.

The inner ring of these Namura piston rings is made from a low-tension, compression-faced material. This design provides a good seal against the cylinder wall while allowing for a slight expansion of the piston during the combustion process. The outer ring, on the other hand, is made from a high-tension, oil-control material. This material effectively prevents oil from seeping past the rings and into the crankcase, maintaining optimal engine lubrication and reducing the risk of engine wear.

Each piston ring set comes with a properly balanced set of rings, ensuring that the rings work together harmoniously, reducing the chance of engine vibrations and noise. The rings are also precision-machined to ensure a perfect fit and optimal ring groove clearance.

When installing these Namura piston rings, it is essential to follow the manufacturer's instructions carefully. Properly installing the rings is crucial to achieving optimal engine performance and longevity.

In summary, the Namura OR-A424635-GS piston rings are the ideal replacement option for your Yamaha WR250F motorcycle (2005-2013) with a 76.94mm bore. These rings offer improved engine efficiency, enhanced power output, and increased fuel economy, all while ensuring a perfect seal between the piston and cylinder wall for optimal engine performance and longevity.

Buying Namura ORNA-RA424635-GS piston rings for a Yamaha WR250F with a 76.94mm bore size can be a consideration for those in need of replacement parts. Here are some pros and cons that might help in making an informed decision.

1. High-quality material: Namura piston rings are known for their durability and ability to withstand high temperatures and pressures.

2. Precise fit: These piston rings are specifically designed for the Yamaha WR250F model with a 76.94mm bore size, ensuring a precise fit.

3. Improved engine performance: Worn or damaged piston rings can lead to engine issues such as loss of power, misfires, and poor fuel efficiency. Replacing them with new ones can help improve engine performance.

4. Value for money: Namura piston rings are competitively priced compared to other brands, making them a cost-effective option for many riders.

1. Installation difficulty: Installing piston rings can be a challenging process, especially for those without experience. It may require specialized tools and knowledge.

2. Risk of damaging the piston: Improper installation or use of incorrect ring size can result in damage to the piston or other engine components.

3. Potential for noise: New piston rings may produce noise when installed, which can be concerning for some riders. However, this is usually a temporary issue that resolves itself after a few miles of riding.

In conclusion, buying Namura ORNA-RA424635-GS piston rings for a Yamaha WR250F with a 76.94mm bore size can offer several benefits, including improved engine performance and value for money. However, it's essential to consider the potential challenges, such as installation difficulty and noise, before making a purchase. If you have the necessary skills and experience, or are willing to pay for professional installation, these piston rings can be a worthwhile investment.

If you're in need of piston rings for your Yamaha WR250F and have the necessary skills or access to professional installation services, Namura ORNA-RA424635-GS piston rings can be a cost-effective and high-quality option. Make sure to double-check the bore size and follow the installation instructions carefully to ensure a successful installation.

Details:

This is helpful if you are buying multiple items. Parts without fitment are to be assumed universal and may require vehicle modification. 2005 - 2013 Yamaha WR250F Dirt Bike Namura Piston Rings 76.94mm: Ring Set Contains: ring to match a single piston. Compatibility: Kawasaki KX250F 2004 - 2009 , Suzuki RM-Z 250 2006 , Yamaha WR250F 2005 2013 , YZ250F 2013.

This Namura ring set does NOT fit OEM pistons.: Brand: Namura, model Number: ORNA-RA424635-GS. I need to exchange an item.

part #: ornara424635 price

• $14.95

specifications pistondon:

• for models: Wr250f
• for makes: Yamaha
• for years: 2005-2013
• brand: Namura
• mpn: Orna-ra424635-gs
• part type: Ring Piston

general pistondon:

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

returns pistondon:

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

offer pistondon:

• started: March 22, 2026
• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 9

payments pistondon:

• other
• wallet: Paypal
• credit card: Visa

seller pistondon:

• # reviews: 80672
• city: San Marcos, CA
• rating: 99.9%

shipping pistondon:

• transit: 3-6 Days
• cost: $0.00
• type: Fixed
• service: Standard
• class: Standard

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