## Piston Rings 83.46mm Namura NA-20040-6R - Reliability and Performance for Your Engine Namura NA-20040-6R piston rings with a diameter of 83.46mm are a key element ensuring optimal performance, efficiency, and longevity of your motorcycle or scooter engine. Often overlooked, piston rings play a crucial role in maintaining combustion chamber seal and proper lubrication. Namura, a renowned manufacturer of motorcycle parts, provides rings designed for specific applications, guaranteeing a perfect fit and reliability. ### Advanced Materials and Technologies Namura utilizes high-quality materials and technologies in the production of its piston rings. The type of cylinder sleeve, its coating, engine size, and piston stroke (2 or 4 stroke) - all these factors are considered when selecting the optimal material composition, ensuring excellent performance under all conditions. ### Compression Rings Namura compression rings are made of highly ductile cast iron or stainless steel alloy, characterized by excellent wear resistance and providing a tight seal for the combustion chamber. Additionally, depending on the model, chrome, phosphate, and nitride coatings are used, increasing durability and resistance to extreme temperatures. ### Oil Rings Namura oil rings consist of three components: two scraper rings made of highly ductile cast iron or stainless steel, coated with chrome, nitride, or phosphate, and one expander ring made of stainless steel. This design guarantees efficient removal of excess oil and maintains optimal lubrication, minimizing wear and extending engine life. By choosing Namura NA-20040-6R piston rings, you are investing in quality, reliability, and the long life of your engine.