## Namura NA-50080R Piston Rings - Reliability and Performance for Your Engine Namura NA-50080R piston rings, designed for pistons with diameters of 79.95mm, 79.96mm, and 79.97mm, are a crucial component for optimal engine performance, efficiency, and longevity. Often overlooked, piston rings play a fundamental role in sealing the combustion chamber and controlling oil consumption. Namura, a renowned manufacturer of motorcycle parts, delivers top-quality rings designed for the specific requirements of each application. ### Materials and Construction The selection of materials for piston ring production is crucial for their effectiveness. Namura utilizes advanced ductile iron or stainless steel alloys, characterized by excellent wear resistance and providing a tight seal. Additionally, depending on the model and application, the rings may be coated with chrome, phosphate, or nitride, further enhancing their durability and corrosion resistance. The type of cylinder sleeve, its coating, engine displacement, and stroke type (2 or 4) - all these factors influence the selection of the optimal material composition to ensure the best operating parameters. ### Compression Rings Compression rings, made of highly ductile cast iron or stainless steel alloy, ensure a tight seal of the combustion chamber, minimizing pressure loss and maximizing engine performance. Chrome, phosphate, or nitride coatings further enhance their wear resistance. ### Oil Rings Oil rings consist of three components: two scraper rails made of highly ductile cast iron or stainless steel, and a single expander ring made of stainless steel. They ensure precise oil metering, protecting the cylinder from excessive lubrication and minimizing oil consumption. By choosing Namura NA-50080R piston rings, you invest in the reliability and longevity of your engine.