NAMURA TECHNOLOGIES NA-40005-4R Piston Rings Atvs .040 4-STROKE 84MM

( Brand: Namura Technologies ), ( Manufacturer Part Number: NA-40005-4R ), ( Part Type: Ring Piston )

Review NAMURA TECHNOLOGIES .040 Over Bore Piston Rings For Yamaha 4-stroke Atvs 84mm Fast Ship fits 350

Introducing the Namura NA-4005-4R 040 piston rings for Yamaha 350 4-stroke ATVs with a piston bore size of 84mm. These piston rings are meticulously engineered to provide optimal performance and durability for your ATV.

The outer piston ring is designed with a rigid, compression-resistant material to ensure a perfect seal against the cylinder wall. This feature helps minimize compression loss and maximizes engine efficiency. The ring also features a chamfered edge that facilitates easy installation and helps prevent damage to the cylinder wall during installation.

The inner piston ring, on the other hand, is made of a softer material to allow for proper piston-to-liner clearance and prevent scuffing. This design ensures proper piston movement and reduces wear and tear on the piston and cylinder wall.

Both rings are manufactured using precision machining techniques to ensure uniformity in size and shape. This ensures a perfect fit and proper function in your engine. The rings are also coated with a layer of graphite to reduce friction and wear, providing a longer service life.

These piston rings are suitable for Yamaha 350 4-stroke ATVs and are easy to install. They come in a set of four rings, including two compression rings and two oil control rings. Each ring is carefully packaged to ensure they arrive in excellent condition.

In summary, the Namura NA-4005-4R 040 piston rings for Yamaha 350 4-stroke ATVs are designed to provide optimal performance and durability. The outer ring's rigid material ensures a perfect seal against the cylinder wall, while the inner ring's soft material allows for proper piston movement. Both rings are precision machined and coated with graphite to reduce friction and wear. These rings are easy to install and come in a set of four.

The Namura NA-4005-4R 040 piston rings are designed for use in Yamaha 350 4-stroke ATVs with a piston bore size of 84mm. Here are some pros and cons that might help you decide if these piston rings are the right choice for your vehicle:

1. Precision-machined piston rings: These rings are designed with precision-machined grooves to ensure a perfect fit and seal in the cylinder.

2. High-quality material: The piston rings are made of high-quality material that can withstand the extreme heat and pressure of an ATV engine.

3. Reduced engine wear: By providing a better seal, these piston rings can help reduce engine wear and improve overall engine performance.

4. Improved power delivery: A better seal also means more efficient combustion and improved power delivery.

1. Cost: Compared to some other piston ring options, these Namura rings may be more expensive.

2. Installation: Installing piston rings can be a complex and time-consuming process, and it may require specialized tools and knowledge.

3. Potential for damage: If not installed correctly, piston rings can be damaged, leading to engine issues.

The Namura NA-4005-4R 040 piston rings offer several advantages for Yamaha 350 4-stroke ATVs, including improved engine performance, reduced wear, and improved power delivery. However, they come with a higher cost and the potential for installation issues. Ultimately, the decision to purchase these piston rings depends on your budget, technical abilities, and desired performance improvements for your ATV.

If you're looking for high-quality piston rings that can improve your ATV's engine performance and reduce wear, the Namura NA-4005-4R 040 piston rings are a solid choice. However, if you're on a tight budget or not comfortable with the installation process, you may want to consider alternative options or seek professional assistance.

Details:

Kit Includes 2 Compression Rings, 1 Oil Ring Scraper Rings you get exactly what is pictured. Rings are for .040 over bore size - 84.00mm. Made in Taiwan. Compatible with Yamaha model's below: 1987 Big Bear 350 4x4 YFM350FW.

1987 Moot-4 350 YFM350ER. Manufactured by Namura.

part #: na400054r prices

• $20.12-$22.03

specifications pistondon:

• for models: 350
• for makes: Yamaha
• brand: Namura Technologies
• mpn: Na-40005-4r
• part type: Ring Piston

offer pistondon:

• sold: 0
• availability: In Stock
• started: June 2, 2025
• quantity: 1
• options: Ship-to-home

payments pistondon:

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

general pistondon:

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

shipping pistondon:

• cost: $0.00
• type: Fixed
• transit: 2-5 Days
• carrier: USPS
• service: USPS First Class, USPS Priority Mail Small Flat Rate Box, USPS Priority Mail Express
• class: Standard, Expedited

returns pistondon:

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

seller pistondon:

• # reviews: 2007
• city: Minford OH
• rating: 100.0%

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