## Namura NA-20040R Piston Rings 81.96mm - Reliability and Performance Namura NA-20040R piston rings with a diameter of 81.96mm are a key element ensuring optimal engine performance for your motorcycle or scooter. Often overlooked, piston rings have a huge impact on efficiency, durability, and combustion effectiveness. Namura, known for its high-quality parts, designs its rings for specific applications, taking into account the type of cylinder sleeve, its coating, engine size, and stroke type (2 or 4). ### Advanced Materials and Technologies The materials and technologies used in the production of Namura piston rings guarantee their reliability and long service life. Both compression and oil rings are made of durable alloys, providing excellent sealing and wear resistance. ### Compression Rings Namura NA-20040R compression rings are made of highly ductile cast iron or stainless steel alloy, ensuring excellent wear resistance and tightness. Additional chrome, phosphate, or nitride coatings increase their durability and adapt them to specific operating conditions. ### Oil Rings The oil rings consist of three elements: two scraper rails made of highly ductile cast iron or stainless steel alloy, coated with chrome, nitride, or phosphate, and one stainless steel expander ring. This design ensures optimal lubrication and prevents oil from entering the combustion chamber. ### Namura Brand - Guarantee of Quality By choosing Namura NA-20040R piston rings, you invest in quality and reliability. The Namura brand is synonymous with precision and attention to detail, which translates into long-term and trouble-free operation of your vehicle.