## Piston Rings 68.70mm Namura NA-10025-1R - Reliability and Performance Piston rings, often overlooked, are a crucial element influencing engine performance, durability, and combustion efficiency. The Namura NA-10025-1R with a diameter of 68.70mm guarantees quality and precision, ensuring optimal performance for your motorcycle or scooter. ### Advanced Materials and Technologies Namura utilizes top-quality materials, specifically selected for the intended application of the rings. The type of cylinder sleeve, its coating, engine displacement, and stroke type (2 or 4) all influence the composition of the rings to ensure a perfect fit for operating conditions. ### 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. Additional chrome, phosphate, and nitride coatings enhance their durability and corrosion resistance, meeting the demands of even the most challenging applications. ### Oil Control Rings The oil control ring set consists of three 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. This design ensures effective oil scraping, minimizing oil consumption and preventing it from entering the combustion chamber. ### Namura Brand - Synonym for Quality By choosing Namura NA-10025-1R piston rings, you are investing in proven quality and reliability. Precision manufacturing, advanced materials, and attention to detail guarantee long-lasting and trouble-free operation of your engine.