## Piston Rings 83.50mm Namura NA-40005-2R - Reliability and Performance Namura NA-40005-2R piston rings with a diameter of 83.50mm are a key element ensuring optimal performance, efficiency, and engine longevity. Although often overlooked, piston rings play a crucial role in the proper operation of the power unit. The Namura brand is renowned for its high-quality components, and these rings are a perfect example. ### Advanced Materials and Technologies Namura uses advanced materials and technologies in the production of its piston rings. The selection of the appropriate material depends on many factors, such as the type of cylinder sleeve, its coating, engine capacity, and the type of stroke (2 or 4). This guarantees a perfect fit for specific operating conditions. ### Compression Rings Compression rings, made of highly ductile cast iron or stainless steel alloy, are characterized by excellent wear resistance and provide a tight seal. Additionally, chrome, phosphate, and nitride coatings enhance their durability and effectiveness. ### Oil Control Rings Oil control rings consist of three separate components: two scraper rails made of highly ductile cast iron or stainless steel alloy, coated with chrome, nitride, or phosphate, and one stainless steel expander ring. Their task is precise oil metering, minimizing consumption and ensuring optimal lubrication. ### Why choose Namura rings? * **High quality workmanship:** Precise manufacturing and material selection guarantee long life and reliability. * **Optimal performance:** Namura rings contribute to improved engine performance. * **Perfect fit:** Available in various sizes, perfectly matched to specific needs. * **Reputable brand:** Namura is a recognized manufacturer of motorcycle and scooter parts, known for the high quality of its products.