## Piston Rings 82.458mm Namura NA-80004-2R - Reliability and Performance for Your Engine Namura 82.458mm NA-80004-2R piston rings are a key component for optimal engine performance, efficiency, and longevity. Often overlooked, piston rings play a fundamental role in sealing the combustion chamber and regulating oil flow. Namura, known for its high-quality motorcycle and scooter parts, offers piston rings designed for the specific requirements of each application. ### Materials and Construction The selection of materials for piston ring manufacturing is crucial for their performance. Namura utilizes carefully selected ductile iron or stainless steel alloys, characterized by excellent wear resistance and providing a tight seal. Additionally, depending on the model, 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 size, and piston stroke (2 or 4 stroke) – all these factors influence the selection of the optimal material composition. ### Compression Rings Compression rings, made of highly ductile cast iron or stainless steel alloy, provide a tight seal for 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 rings, made of highly ductile cast iron or stainless steel alloy, and one expander ring made of stainless steel. The scraper rings, coated with chrome, nitride, or phosphate, effectively regulate oil flow, preventing it from entering the combustion chamber and ensuring optimal cylinder lubrication. ### Namura Precision and Quality By choosing Namura 82.458mm NA-80004-2R piston rings, you are investing in quality and reliability. Precision manufacturing and the selection of high-quality materials guarantee optimal engine performance, increased efficiency, and extended service life.