The Story
Athena Forged Racing Piston Kit Ø 71.96 mm is designed for the Athena Big Bore Cylinder, offering high-performance durability and precision engineering. Manufactured using advanced CNC machining for tight tolerances of less than 0.01 mm, this piston is made from a high-performance aluminum alloy with a high silicon content for enhanced strength and reliability. The piston’s smooth profile promotes optimal flow and flame propagation, while certain models feature a molybdenum disulfide coating on the skirt to reduce friction. Engineered and tested in Italy under extreme conditions, this piston kit ensures excellent performance and longevity.
Features
- Forged piston with high-performance aluminum alloy construction
- CNC-machined for dimensional accuracy within 0.01 mm
- High silicon content for strength and durability
- Smooth profile for optimized flow and combustion
- Some models include molybdenum disulfide skirt coating for reduced friction
- Piston rings with low-friction design for improved performance
- Japanese-made piston rings with wear-resistant coatings (PVD or chromium nitride)
- Includes piston, pin, circlips, and piston rings
- Designed exclusively for competitive use
Specifications
- Big End Pin Diameter: 18x13x53.5 mm
- Bore Diameter: 71.96 mm
- Compression Ratio: 16.0:1
- Displacement: 250 cc
- Net Weight: 0.34 kg
- Number of Segments: 3
- Piston Head Type: Domed
- Piston Pin Type: Biconical
- Piston Type: Forged
Cross-Reference OEM Part Numbers
- S4F07200006A Piston Kit 71.95
- S41316257 Rings
Vehicle Fitments
- Yamaha YZ 250 2T (2003-2025)
Description
Athena Forged Racing Piston Kit Ø 71.96 mm is designed for the Athena Big Bore Cylinder, offering high-performance durability and precision engineering. Manufactured using advanced CNC machining for tight tolerances of less than 0.01 mm, this piston is made from a high-performance aluminum alloy with a high silicon content for enhanced strength and reliability. The piston’s smooth profile promotes optimal flow and flame propagation, while certain models feature a molybdenum disulfide coating on the skirt to reduce friction. Engineered and tested in Italy under extreme conditions, this piston kit ensures excellent performance and longevity.
Features
- Forged piston with high-performance aluminum alloy construction
- CNC-machined for dimensional accuracy within 0.01 mm
- High silicon content for strength and durability
- Smooth profile for optimized flow and combustion
- Some models include molybdenum disulfide skirt coating for reduced friction
- Piston rings with low-friction design for improved performance
- Japanese-made piston rings with wear-resistant coatings (PVD or chromium nitride)
- Includes piston, pin, circlips, and piston rings
- Designed exclusively for competitive use
Specifications
- Big End Pin Diameter: 18x13x53.5 mm
- Bore Diameter: 71.96 mm
- Compression Ratio: 16.0:1
- Displacement: 250 cc
- Net Weight: 0.34 kg
- Number of Segments: 3
- Piston Head Type: Domed
- Piston Pin Type: Biconical
- Piston Type: Forged
Cross-Reference OEM Part Numbers
- S4F07200006A Piston Kit 71.95
- S41316257 Rings
Vehicle Fitments
- Yamaha YZ 250 2T (2003-2025)
