## Namura NA-20070-4R Piston Rings 82.96mm - Reliability and Performance Namura NA-20070-4R piston rings with a diameter of 82.96mm are a key element ensuring optimal performance, efficiency, and engine longevity. Although often overlooked, these rings play a vital role in the proper functioning of the piston. 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 piston stroke. ### Advanced Materials and Technologies The choice of materials for the production of piston rings is crucial for their performance. Namura uses highly ductile cast iron or stainless steel alloy, both characterized by excellent wear resistance and providing a tight seal. Additionally, depending on the model, chrome, phosphate, and nitride coatings are used to meet the requirements of a specific engine. ### Compression Rings Compression rings, made of highly ductile cast iron or stainless steel alloy, ensure the tightness of the combustion chamber and prevent gases from entering the crankcase. Chrome, phosphate, or nitride coatings increase their durability and wear resistance. ### Oil Rings Oil 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 a single expansion ring made of stainless steel. Their task is to effectively scrape excess oil from the cylinder walls, preventing it from burning and maintaining optimal lubrication. ### Namura Brand - Guarantee of Quality By choosing Namura NA-20070-4R piston rings, you are investing in proven quality and reliability. The precision of workmanship, the selection of materials, and advanced production technologies guarantee long-lasting and trouble-free operation of your motorcycle or scooter engine.