## Namura NA-80001R Piston Rings 90.958mm - Reliability and Performance The Namura NA-80001R piston rings with a diameter of 90.958mm are a key component for ensuring optimal performance, durability, and engine efficiency. Often overlooked, these rings play a fundamental role in the proper functioning of the piston. Namura, known for its high-quality motorcycle and scooter 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). This allows for the selection of the optimal material composition, perfectly matched to the operating conditions. ### Key features of Namura piston rings: * **Precise fit:** The 90.958mm diameter guarantees a perfect fit to the cylinder, minimizing compression losses and ensuring maximum power. * **High-quality materials:** Both compression and oil rings are made of durable and wear-resistant materials, such as ductile cast iron or stainless steel alloy. * **Advanced coatings:** Additional coatings, such as chrome, phosphate, and nitride, increase resistance to wear, corrosion, and high temperatures, extending the life of the rings. * **Optimal lubrication:** The oil rings, consisting of two scraper rails and an expander ring, effectively regulate the amount of oil, preventing it from entering the combustion chamber and ensuring proper cylinder lubrication. * **Performance and durability:** Namura NA-80001R rings contribute to increased engine performance, improved compression, and reduced fuel consumption, guaranteeing long-lasting and trouble-free operation. ### Compression Rings: Made of highly ductile cast iron or stainless steel alloy, they provide excellent sealing and wear resistance. Chrome, phosphate, and nitride coatings further enhance these properties. ### Oil Rings: A set of three elements: two scraper rails made of ductile cast iron or stainless steel with a chrome, nitride, or phosphate coating, and one expander ring made of stainless steel. They provide precise control over the amount of oil on the cylinder walls. By choosing Namura NA-80001R piston rings, you are investing in quality, reliability, and the long life of your engine.