NAMURA NX-40005-4R Scooter Piston Rings Towny 40.96MM QT50

( Brand: Namura ), ( Manufacturer Part Number: NX-40005-4R ), ( Type: Piston Ring ), ( Items Included: Piston Rings )

Review NAMURA Scooter 40.96mm Piston Rings For Yamaha Towny 50 fits 1979–1987

Introducing the Namura NX-40005-4R piston rings, specifically designed for the Yamaha QT50 motorbikes manufactured between 1979 and 1987, as well as the Towny 50 and 1982 models. These piston rings are an essential component of your engine's combustion chamber, ensuring a proper seal between the piston and cylinder wall to maintain compression and prevent the leakage of engine gases.

The Namura NX-40005-4R piston rings are engineered with precision and care, featuring a 4-ring design for optimal engine performance. Each ring is meticulously crafted from high-quality, heat-resistant materials to withstand the extreme temperatures and pressures encountered in the combustion process. The inner ring is a compression ring that seals the combustion gases, while the outer ring, also known as the oil control ring, helps in controlling oil consumption by preventing oil from escaping between the piston and cylinder walls.

These piston rings have an internal diameter of 40.96mm, ensuring a perfect fit for the Yamaha QT50 and Towny 50 engines. The rings are designed with a slight taper to facilitate easy installation and removal, making the process more convenient for the mechanic or DIY enthusiast.

The Namura NX-40005-4R piston rings undergo rigorous testing to ensure they meet the highest standards of quality and durability. Their superior design and construction make them an excellent choice for those seeking reliable engine performance and extended engine life.

By investing in these top-tier piston rings, you'll not only enhance the overall efficiency of your engine but also contribute to its longevity. Your Yamaha QT50 or Towny 50 motorbike will run smoother, stronger, and more efficiently, providing you with an enjoyable and dependable riding experience.

Buying Namura NX-40005-4R piston rings for a Yamaha QT50, Towny 50 (1982), or similar models from the year 1979 to 1987 involves considering both advantages and disadvantages.

1. OEM compatibility: These piston rings are manufactured by Namura, a reputable brand known for producing original equipment manufacturer (OEM) parts. This ensures a precise fit and compatibility with the engine.

2. Improved engine performance: New piston rings can reduce engine wear, improve combustion efficiency, and enhance overall performance.

3. Longer engine life: By preventing oil leaks and ensuring a proper seal, new piston rings can contribute to a longer engine life.

1. Cost: Replacing piston rings can be an expensive repair, especially when purchasing OEM parts like the Namura NX-40005-4R.

2. Installation complexity: Installing piston rings requires disassembling the engine, which can be a time-consuming and labor-intensive process.

3. Availability: Depending on the location and availability, it may take some time to source these specific piston rings, especially if they are not readily available in local parts stores.

In conclusion, while the Namura NX-40005-4R piston rings offer the benefits of OEM compatibility, improved engine performance, and longer engine life, the cost, installation complexity, and potential availability issues may deter some buyers.

If you are experiencing issues with your engine's performance or notice oil leaks, and you value the peace of mind that comes with using OEM parts, then purchasing the Namura NX-40005-4R piston rings may be a worthwhile investment. However, if you are budget-conscious or prefer to minimize the complexity of the repair process, you may want to consider alternative options, such as aftermarket piston rings or rebuilding the engine using used parts.

In summary, the decision to buy the Namura NX-40005-4R piston rings depends on your priorities, budget, and willingness to undertake the installation process. If you prioritize OEM quality and long-term engine health, these piston rings may be the best choice for you. However, if cost or installation complexity are concerns, you may want to explore alternative options.

Details:

Specifications: Part: Piston Rings, Size: 40.96mm. Shipping: Items are shipped within a timely manner. Combined shipping is available for multiple items. The expansion ring in manufactured from stainless steel while the scraper rails are either a highly ductile cast iron or alloy.

CRU Products was started by Cycles R Us in 2009. Fits:Make: model: Year: YamahaQT50 Yamahopper1979-1987, Yamaha Towny 50 MJ50 1982. Two scraper rails and a single expansion ring. Product Features Compression rings are manufactured from either a highly ductile cast iron, or stainless steel alloy.

Oil rings 4-stroke applications only consist of three separate components.

part #: nx400054r prices

• $12.04-$19.99

specifications pistondon:

• for makes: Yamaha
• for years: 1979-1987
• brand: Namura
• mpn: Nx-40005-4r
• type: Piston Ring
• items included: Piston Rings

returns pistondon:

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

payments pistondon:

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

seller pistondon:

• city: Chippewa Lake, Ohio
• # reviews: 116747
• rating: 99.9%

offer pistondon:

• availability: In Stock
• started: May 16, 2026
• quantity: 3
• options: Ship-to-home
• sold: 0

general pistondon:

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

shipping pistondon:

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

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