## Namura NA-10000-2R Piston Rings 90.46mm - Reliability and Performance Namura NA-10000-2R piston rings with a diameter of 90.46mm are a key element in ensuring optimal performance, durability, and engine efficiency of your motorcycle or scooter. Often overlooked, piston rings play a fundamental role in ensuring the tightness of the combustion chamber and proper cylinder lubrication. Namura, a renowned manufacturer of motorcycle parts, delivers top-quality piston rings designed for the specific requirements of a given application. ### Advanced Materials and Technologies Namura NA-10000-2R utilizes top-quality materials, such as ductile cast iron or stainless steel alloys, characterized by excellent wear resistance. Additional coatings, such as chrome, phosphate, or nitride, increase durability and provide excellent sealing. The type of cylinder sleeve, its coating, engine capacity, and the type of stroke (2 or 4) are factors that Namura considers when designing piston rings, adapting their composition to specific operating conditions. ### Compression Rings Compression rings, made of ductile cast iron or stainless steel, ensure the tightness of the combustion chamber, minimizing compression losses and maximizing engine performance. Chrome, phosphate, or nitride coatings increase their wear resistance. ### Oil Rings Namura oil rings consist of three elements: two scraper rails made of ductile cast iron or stainless steel, and one expansion ring made of stainless steel. Chrome, nitride, or phosphate coatings on the scraper rails ensure optimal cylinder lubrication and minimize oil consumption. By choosing Namura NA-10000-2R piston rings, you are investing in the reliability and performance of your motorcycle or scooter.