## Namura NA-40007-4R Piston Rings 95.93mm - Reliability and High Performance Namura NA-40007-4R piston rings with a diameter of 95.93mm are a key element ensuring optimal operation, efficiency, and longevity of the engine. Although often overlooked, they play a vital role in maintaining proper compression and lubrication. Namura, known for its high-quality motorcycle parts, offers piston rings designed for specific applications, guaranteeing a perfect fit and reliability. ### Advanced Materials and Technologies The materials used in the production of Namura NA-40007-4R piston rings are one of the most important factors influencing their performance. The type of cylinder sleeve, its coating, engine size, and piston stroke - all these elements are taken into account when selecting the optimal material composition that meets the requirements of a given operating environment. ### 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. Additionally, chrome, phosphate, and nitride coatings increase their durability and corrosion resistance, meeting the requirements of even the most demanding applications. ### Oil Rings Oil rings consist of three separate 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 efficient removal of excess oil, minimizing its consumption and preventing it from entering the combustion chamber. By choosing Namura NA-40007-4R piston rings, you invest in quality and reliability, ensuring optimal operating conditions and long life for your engine.