## Piston Rings 85.97mm Namura NA-10001R - Reliability and Performance for Your Engine Namura NA-10001R piston rings with a diameter of 85.97mm are a key element ensuring optimal performance, efficiency, and longevity of your motorcycle or scooter engine. Often overlooked, piston rings play a fundamental role in ensuring the tightness of the combustion chamber and proper cylinder lubrication. ### Advanced Materials and Technologies Namura, a renowned manufacturer of motorcycle parts, utilizes the highest quality materials and advanced technologies in the production of its piston rings. Carefully selected ductile iron or stainless steel alloys, characterized by exceptional wear resistance, guarantee excellent sealing and long-lasting operation. Additionally, depending on the model, the rings can be coated with chrome, phosphate, or nitride coatings, which further increases their durability and corrosion resistance. ### Compression Rings Namura NA-10001R compression rings are made of highly ductile cast iron or stainless steel alloy, ensuring excellent combustion chamber sealing. Chrome, phosphate, or nitride coatings further enhance their wear and corrosion resistance. ### Oil Rings Oil rings consist of three separate components: two scraper rails made of highly ductile cast iron or stainless steel, coated with chrome, nitride, or phosphate, and a single expander ring made of stainless steel. They ensure efficient removal of excess oil, preventing it from entering the combustion chamber and maintaining optimal cylinder lubrication. ### Precision and Fit Namura NA-10001R piston rings are precisely manufactured to ensure a perfect fit to the cylinder, which translates into optimal performance and minimal fuel consumption. By choosing Namura rings, you invest in the reliability and longevity of your engine.