## Namura NA-80001-4R Piston Rings 91.958mm - Reliability and Performance for Your Engine The Namura 91.958mm NA-80001-4R piston rings are a key component for optimal engine performance, durability, and efficiency. Often overlooked, piston rings play a fundamental role in the proper functioning of the power unit. Namura, known for its high-quality motorcycle and scooter parts, offers piston rings designed for the specific requirements of each application. ### Material Selection and Technology Namura pays special attention to the selection of materials and manufacturing technology for its piston rings. The type of cylinder sleeve, its coating, engine size, and piston stroke (2 or 4 stroke) - all these factors influence the composition of the rings, which is optimally matched to the operating conditions. ### Compression Rings Namura compression rings are made of highly ductile cast iron or stainless steel alloy. Both materials are characterized by excellent wear resistance and provide a tight seal. In addition, depending on the model, chrome, phosphate, and nitride coatings are used to meet the demands of the specific application. ### Oil Control Rings Namura 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 a single expander ring made of stainless steel. This ensures efficient lubrication and removal of excess oil, which translates into a longer engine life. ### Specifications: * Piston Diameter: 91.958mm By choosing Namura NA-80001-4R piston rings, you are investing in the reliability and longevity of your engine.