## Namura NA-10001-4R Piston Rings - Reliability and Performance Namura NA-10001-4R piston rings, designed for pistons with a diameter of 86.97mm and 86.98mm, are a key element in ensuring optimal engine performance for your motorcycle or scooter. Often overlooked, piston rings have a huge impact on efficiency, durability, and combustion effectiveness. Namura, a renowned manufacturer of motorcycle parts, offers a top-quality product designed to provide excellent engine performance. ### Advanced Materials and Technologies Namura NA-10001-4R are piston rings made of high-quality materials, carefully selected for specific operating conditions. The type of cylinder sleeve, sleeve coating, engine size, and piston stroke - all these factors were considered in the design process to ensure a perfect fit and optimal performance. ### Compression Rings The compression rings are made of highly ductile cast iron or stainless steel alloy, which guarantees excellent wear resistance and a tight seal. In addition, depending on the model, chrome, phosphate, or nitride coatings have been applied to meet the requirements of even the most demanding engines. ### Oil Rings Oil rings consist of three separate components: two scraper rails made of highly ductile cast iron or a stainless steel alloy, coated with chrome, nitride, or phosphate, and a single expander ring made of stainless steel. This design ensures efficient removal of excess oil, minimizing its consumption and preventing it from entering the combustion chamber. By choosing Namura NA-10001-4R piston rings, you are investing in the reliability and longevity of your engine.