Namura Technologies FA-20085-B 48.46mm Piston Kit for Nikasil Cylinders

The Namura Technologies FA-20085-B is a 48.46mm B-size (+0.01mm) piston kit engineered as a precision replacement for Nikasil, SCEM, Boron Composite, and Ceramic-coated cylinders. Built to exact OEM specifications, this kit installs without any boring or dimensional modifications, making it a cost-effective solution for restoring top-end performance. The "B" oversize designation (0.01mm over standard) is specifically designed to compensate for minimal cylinder wear while preserving the integrity of expensive coated cylinder bores.

Key Features:

• MOS2 (Molybdenum/Teflon) Coated Skirts — Applied via a rolled-on process that bonds 10 times stronger than spray-on coatings, delivering increased heat transfer, reduced friction, and protection against cold seizures
• Hyper-Eutectic Casting Process — Higher silicon content reduces thermal expansion rates and increases wear resistance for longer service life under high-temperature conditions
• Anodized Dome — Hard-anodized dome increases heat resistance and durability; anodized pistons are 75% stronger than non-anodized alternatives
• Machined Smooth Head — Reflects combustion heat and reduces carbon buildup; tests have shown this feature can improve horsepower and fuel economy by up to 6%
• OEM-Quality Riken Rings — Rings are manufactured by Riken, the world's largest OEM ring manufacturer, ensuring proper seal and longevity
• Complete Kit — Includes individually wrapped piston, OEM-quality rings (boxed separately), wrist pin, and circlips — everything needed for a complete top-end rebuild

The FA-20085-B piston kit delivers high-performance specifications at an OEM-replacement price point, making it an excellent choice for motocross and powersports engine rebuilds requiring precision fit in coated cylinder bores.