## Namura NA-50011-6R Piston Rings 98.07mm - Reliability and Performance Namura NA-50011-6R piston rings with a diameter of 98.07mm are a key element for optimal engine performance. Although often overlooked, these rings play a vital role in efficiency, durability, and combustion effectiveness. Namura, known for its high-quality motorcycle parts, designs piston rings for specific applications, taking into account the type of cylinder sleeve, its coating, engine size, and stroke type (2 or 4). ### Key features of Namura piston rings: * **Precise fit:** The 98.07mm diameter guarantees a perfect fit to the cylinder, minimizing compression losses and ensuring optimal engine operation. * **Durable materials:** Namura rings are made of highly ductile cast iron or stainless steel alloy, ensuring excellent wear resistance and long-lasting performance. * **Advanced coatings:** Depending on the model, the rings may be coated with chrome, phosphate, or nitride, further increasing their durability and corrosion resistance. * **Excellent sealing:** Namura rings provide a tight seal for the combustion chamber, minimizing power loss and improving engine efficiency. ### Compression rings: Made of highly ductile cast iron or stainless steel alloy, compression rings provide excellent sealing and wear resistance. Additional coatings, such as chrome, phosphate, or nitride, enhance their durability and corrosion resistance. ### Oil rings: The oil ring set consists of three components: two scraper rings made of highly ductile cast iron or stainless steel alloy, and one expander ring made of stainless steel. Chrome, nitride, or phosphate coatings on the scraper rings ensure optimal lubrication and prevent excessive cylinder wear. By choosing Namura NA-50011-6R piston rings, you invest in quality and reliability, which translates into longer engine life and better performance.