## Piston Rings 74.20mm Namura NA-20005-6R - Reliability and Performance for Your Engine Namura 74.20mm NA-20005-6R piston rings are a key component for ensuring optimal performance, durability, and efficiency of your motorcycle or scooter engine. Often overlooked, piston rings play a fundamental role in maintaining combustion chamber seal and proper lubrication. Namura, a renowned manufacturer of motorcycle parts, offers piston rings designed for specific applications, guaranteeing a perfect fit and long-lasting operation. ### Advanced Materials and Technologies Namura utilizes high-quality materials and advanced technologies in the production of its piston rings. The type of cylinder sleeve, sleeve coating, engine size, and piston stroke (2 or 4 stroke) - all these factors are taken into account when selecting the optimal material composition for a given operating environment. ### Compression Rings Namura compression rings, made of highly ductile cast iron or stainless steel alloy, are characterized by excellent wear resistance and provide a tight seal for the combustion chamber. Additional chrome, phosphate, and nitride coatings enhance their durability and corrosion resistance. ### Oil Rings Namura oil rings consist of three components: two scraper rings made of highly ductile cast iron or stainless steel alloy, coated with chrome, nitride, or phosphate, and one expander ring made of stainless steel. This design ensures precise oil metering, minimizing oil consumption and preventing excessive carbon buildup. ### Specifications: * Piston Diameter: 74.20mm By choosing Namura 74.20mm NA-20005-6R piston rings, you are investing in the reliability and longevity of your engine.