## Piston Rings 82.96mm Namura NA-20040-4R - Reliability and Performance for Your Engine Namura NA-20040-4R piston rings with a diameter of 82.96mm are a key component ensuring optimal performance, efficiency, and longevity of your motorcycle or scooter engine. Often overlooked, piston rings play a fundamental role in ensuring combustion chamber sealing and proper lubrication. Namura, a renowned manufacturer of motorcycle parts, offers piston rings designed for the specific requirements of various engines. ### Advanced Materials and Technologies Namura NA-20040-4R utilizes carefully selected materials and coatings to meet the demands of even the most stressed engines. The type of cylinder sleeve, sleeve coating, engine size, and piston stroke (2 or 4 stroke) - all these factors influence the selection of the optimal ring composition. ### Compression Rings Made of highly ductile cast iron or stainless steel alloy, compression rings guarantee excellent wear resistance and ensure a tight seal in the combustion chamber. In addition, chrome, phosphate, and nitride coatings enhance their durability and corrosion resistance. ### Oil Rings Oil rings consist of three components: two scraper rails made of highly ductile cast iron or stainless steel, coated with chrome, nitride, or phosphate, and one stainless steel expander ring. They ensure precise oil metering, minimizing oil consumption and preventing it from entering the combustion chamber. ### Namura Brand - Guarantee of Quality By choosing Namura NA-20040-4R piston rings, you are investing in quality and reliability. Namura is a brand known for its precision and attention to detail, which translates into long life and trouble-free operation of your vehicle.