## Namura NA-20005-2R Piston Rings 73.20mm - Reliability and Performance for Your Engine The Namura NA-20005-2R piston rings, with a diameter of 73.20mm, are a crucial component for optimal engine performance, efficiency, and longevity. Often overlooked, these rings play a fundamental role in sealing the combustion chamber and controlling oil consumption. Namura, renowned for high-quality motorcycle and scooter parts, designs its rings for specific applications, considering the type of cylinder sleeve, its coating, engine size, and stroke type (2 or 4). ### Advanced Materials and Technologies The use of appropriate materials is key to success. Namura NA-20005-2R rings are made of highly durable cast iron or stainless steel alloys, guaranteeing excellent wear resistance and sealing. Additionally, depending on the model, chrome, phosphate, and nitride coatings are applied to meet the demands of even the most extreme operating conditions. ### Compression Rings The purpose of the compression rings is to ensure a tight seal in the combustion chamber. Made of ductile iron or stainless steel, coated with chrome, phosphate, or nitride, they guarantee minimal pressure loss and optimal engine performance. ### Oil Rings Oil rings consist of three components: two scraper rings made of ductile iron or stainless steel, coated with chrome, nitride, or phosphate, and a single expander ring made of stainless steel. Their task is to precisely dose the oil, preventing excessive consumption and ensuring optimal lubrication. By choosing Namura NA-20005-2R piston rings, you are investing in the reliability and longevity of your engine.