## Namura NX-40010-2R Piston Rings 56.45mm - Reliability and Performance for Your Engine Namura NX-40010-2R piston rings with a diameter of 56.45mm are a key element ensuring optimal performance, efficiency, and longevity of your motorcycle or scooter engine. Often overlooked, piston rings play a fundamental role in maintaining combustion chamber seal and proper cylinder lubrication. ### Advanced Materials and Technologies Namura, a renowned manufacturer of motorcycle parts, utilizes the highest quality materials and advanced technologies in the production of its piston rings. The selection of appropriate materials, taking into account the type of cylinder sleeve, its coating, engine capacity, and stroke type (2 or 4), guarantees a perfect fit for specific operating conditions. ### Compression Rings Made of highly ductile cast iron or stainless steel alloy, the compression rings are characterized by excellent wear resistance and provide a tight seal for the combustion chamber. Additional chrome, phosphate, or nitride coatings enhance their durability and effectiveness depending on the application. ### Oil Rings 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 ensures precise oil metering, minimizing oil consumption and preventing excessive carbon buildup. By choosing Namura NX-40010-2R piston rings, you are investing in the reliability and longevity of your engine.