Namura Technologies NA-50019R Piston Ring Set 98.94mm Powersports Engine Rings

The Namura Technologies NA-50019R is a precision piston ring set sized at 98.94mm, engineered to restore proper compression, oil control, and engine efficiency in powersports applications. Each ring set is sized for one piston and is matched to Namura's application-specific standards for reliable, long-term performance.

Compression Rings:

• Steel top ring with gas nitriding treatment for superior hardness and wear resistance
• Cast iron second ring functions as a wiper ring, sweeping oil away from the combustion chamber
• Composed of highly ductile cast iron or stainless steel alloy for excellent wear resistance and a gas-tight seal
• Chrome, phosphate, and nitride coatings applied as needed to meet the demands of the application

Oil Control Ring:

• Three-piece oil ring assembly for precise oil management
• Two scraper rails constructed from highly ductile cast iron or stainless steel alloy
• Scraper rails feature chrome, nitride, or phosphate coating for durability
• Single expansion ring manufactured from stainless steel

Key Features:

• Ring set covers one piston per set
• 98.94mm bore size
• Designed specifically for the application — cylinder sleeve type, sleeve coating, engine displacement, and stroke cycle all factor into ring composition
• Meets or exceeds OEM specifications
• Manufactured to exacting tolerances for proper ring end gap and sealing performance

Namura Technologies piston rings are produced to OEM-level quality standards, making the NA-50019R a dependable replacement choice for powersports engine rebuilds and top-end refreshes.