## Piston Rings 66.46mm Namura NA-30000-2R - Reliability and Performance for Your Engine Namura NA-30000-2R piston rings with a diameter of 66.46mm are a key element ensuring optimal operation, efficiency, and longevity of your engine. Often overlooked, these rings play a fundamental role in sealing the combustion chamber and controlling oil consumption. 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). ### Precision Manufacturing and Material Selection The materials used in the production of Namura piston rings are one of the most important factors influencing their performance. Both compression and oil rings are made of highly ductile cast iron or stainless steel alloy, guaranteeing excellent wear resistance and sealing. Additionally, depending on the model, chrome, phosphate, and nitride coatings are used to meet the requirements of a specific engine. ### Compression Rings - Guaranteed Seal Namura compression rings provide a tight seal of the combustion chamber, maximizing compression and engine power. Their precise manufacturing and material selection minimize energy loss and contribute to optimal fuel combustion. ### Oil Rings - Oil Consumption Control Namura oil rings consist of three components: two scraper rings made of highly ductile cast iron or stainless steel with a chrome, nitride, or phosphate coating, and one expander ring made of stainless steel. This ensures effective scraping of excess oil from the cylinder walls, minimizing its consumption and preventing it from entering the combustion chamber. By choosing Namura NA-30000-2R piston rings, you are investing in the reliability and long life of your engine.