NAMURA NA-40000-3R Piston Rings 64.7MM

( Brand: Namura ), ( Manufacturer Part Number: NA-40000-3R ), ( Type: Piston Ring ), ( Items Included: Piston Rings )

Review NAMURA Motorcycle 64.7mm Piston Rings For Yamaha fits RZ350 1984–1985

The Namura NA-40000-3R piston rings are specifically designed for Yamaha RZ350 motorcycles manufactured between 1984 and 1985. These rings are an essential component of the engine's combustion process, sealing the gap between the piston and the cylinder wall to prevent the leakage of combustion gases and engine oil.

The NA-40000-3R piston rings are made from a high-quality material that ensures a tight seal, prolonging engine life and improving overall performance. The rings consist of a compression ring, an oil control ring, and an oil scraper ring. The compression ring is responsible for sealing the combustion gases, while the oil control ring prevents oil from leaking into the combustion chamber. The oil scraper ring collects the engine oil that drips down from the piston and pushes it back up to the crankcase.

The inner diameter of the compression ring is 64.7mm, making it a perfect fit for the Yamaha RZ350 engine. The rings also feature a uniformly ribbed surface that helps ensure an even seal between the piston and cylinder wall. The ribbing also provides additional strength and durability to the rings, allowing them to withstand the high pressures and temperatures generated during engine operation.

Installing the Namura NA-40000-3R piston rings requires a certain level of mechanical skill and experience. It is recommended that they be installed by a professional mechanic or someone with a good understanding of engine disassembly and reassembly procedures. Improper installation could result in engine damage or reduced performance.

In conclusion, the Namura NA-40000-3R piston rings are a crucial upgrade for Yamaha RZ350 motorcycles manufactured between 1984 and 1985. These high-quality rings provide a tight seal, prevent oil and gas leakage, and improve overall engine performance. However, they require professional installation to ensure proper function and prevent potential damage to the engine.

1. Quality: Namura is a well-known brand in the automotive aftermarket industry, renowned for producing high-quality piston rings. These rings are designed to provide excellent sealing, reducing the likelihood of oil leaks and combustion chamber blow-by.

2. Durability: The Namura piston rings are made from top-quality materials that offer increased resistance to wear and tear. This results in a longer lifespan compared to some OEM (original equipment manufacturer) or aftermarket alternatives.

3. Precision: Namura piston rings are manufactured to tight tolerances, ensuring a precise fit in the engine cylinder. This results in better engine performance and improved fuel efficiency.

1. Cost: Namura piston rings may be more expensive than some other aftermarket brands or even OEM alternatives. For budget-conscious consumers, this could be a significant drawback.

2. Availability: Depending on the location and the specific demand for Namura piston rings for a Yamaha RZ350, availability may be limited. This could result in a longer waiting time for the parts.

3. Installation: Installing piston rings can be a complex process that requires specialized tools and knowledge. If you're not confident in your ability to install the rings yourself, you may need to pay for professional installation, adding to the overall cost.

When considering buying Namura NA-40000-3R piston rings for a Yamaha RZ350 (1984-1985), it's crucial to weigh the advantages and disadvantages carefully. The high-quality, durability, and precision offered by Namura may justify the added cost for those seeking optimal engine performance and longevity. However, for those on a tight budget or who prefer a more straightforward aftermarket solution, alternative options may be worth exploring. Ultimately, the decision depends on your priorities and the specific requirements of your motorcycle.

If your primary goal is to ensure optimal engine performance and longevity, and you have the financial resources to invest in high-quality piston rings, then the Namura NA-40000-3R piston rings for your Yamaha RZ350 (1984-1985) could be a worthwhile investment. However, if you're on a budget or prefer a more affordable aftermarket alternative, it's recommended that you research other reputable brands to find piston rings that meet your needs and budget while still providing reliable performance.

Details:

Oil rings 4-stroke applications only consist of three separate components. The expansion ring in manufactured from stainless steel while the scraper rails are either a highly ductile cast iron or alloy. Combined shipping is available for multiple items. Shipping: Items are shipped within a timely manner.

CRU Products was started by Cycles R Us in 2009. Product Features Compression rings are manufactured from either a highly ductile cast iron, or stainless steel alloy. Specifications: Part: Piston Rings, Size: 64.7mm, Notes: Skirts are 20-percent thicker than OEM. Fits:Make: model: Year: Yamaha's.

Two scraper rails and a single expansion ring.

part #: na400003r prices

• $13.56-$21.78

specifications pistondon:

• for models: Rz350
• for makes: Yamaha
• for years: 1984-1985
• brand: Namura
• mpn: Na-40000-3r
• type: Piston Ring
• items included: Piston Rings

seller pistondon:

• # reviews: 116743
• city: Chippewa Lake, Ohio
• rating: 99.9%

payments pistondon:

• credit card: Visa
• wallet: Paypal
• other

shipping pistondon:

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

returns pistondon:

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

offer pistondon:

• sold: 0
• started: May 16, 2026
• availability: In Stock
• quantity: 1
• options: Ship-to-home

general pistondon:

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

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