TOP END PISTON & GASKET KIT 77MM YAMAHA WR/YZ 250 14-15, ATHENA P5F0770187008C, SET C
Athena Top End Piston Kit includes a forged 4-stroke piston with a bore diameter of 76.98 mm and a top end gasket kit. The piston is made from a special high-performance aluminum alloy with high silicon content and features a smooth profile for regular flow and perfect flame propagation. Some pistons have a molybdenum disulfide coating on the skirts to reduce friction. The kit includes two Japanese-made piston rings with wear-resistant coatings (PVD or chromium nitride) for increased durability. The gasket kit utilizes Athena's experience and technology for reliability, with precise cutting achieved by the latest generation lasers and surface treatments for improved sealing. Technical features: Big End Pin Diameter (mm) 16x10x42, Bore Diameter (mm) 76.98, Compression Height (mm) 20.40, Compression Ratio 13.5:1, Displacement (cc) 250, Number Of Segments 2, Piston Pin Type Standard, Piston Type Forged.
- SKU
- 56-T1005.C_ATH
- Brand
- Athena
- Availability
- In Stock (1)
FULL DESCRIPTION
Athena Top End Piston and Gasket Kit
Enhance your motorcycle's engine performance and reliability with the Athena Top End Piston and Gasket Kit. This comprehensive kit combines a high-performance forged 4-stroke piston with a perfectly matched top-end gasket set, engineered to work in unison for optimal results.
Athena meticulously studies, develops, and tests all piston technologies and materials in-house. They also engineer the entire development of compatible gaskets, ensuring a perfectly tuned kit for maximum reliability and elevated performance after a piston replacement.
Key Features:
- Forged 4-Stroke Piston: Manufactured using state-of-the-art numerical control (CNC) machines from a special high-performance aluminum alloy with a high silicon content. This ensures reliability comparable to OE pistons while offering increased resistance and excellent performance.
- Optimized Profile: The piston's smooth profile promotes regular flow and perfect flame propagation for improved combustion efficiency.
- Friction Reduction: Some piston skirts feature a molybdenum disulfide coating applied by screen printing, further reducing friction to enhance performance and durability.
- High-Quality Piston Rings: Included piston rings, made in Japan, feature wear-resistant coatings (PVD or chromium nitride) to minimize friction with the cylinder, leading to higher performance and extended durability.
- Reliable Gasket Set: Athena gaskets are built upon extensive industry experience and constant technological development. Produced following strict manufacturer parameters and utilizing latest-generation lasers for precise cutting, these gaskets ensure excellent sealing.
- Advanced Sealing: Athena employs a wide range of raw materials, surface treatments to address irregularities, and material stress-relieving processes to improve sealing in critical areas.
- Kit Includes: Forged piston and top-end gasket set.
Technical Specifications:
- Piston Diameter: 76.98 mm
- Big End Pin Diameter: 16x10x42 mm
- Compression Height: 20.40 mm
- Compression Ratio: 13.5:1
- Displacement: 250 cc
- Number of Rings: 2
- Piston Pin Type: Standard
- Piston Type: Forged
Note: Products designed for displacements and power exceeding road code limits are intended exclusively for competitive use. Athena disclaims all responsibility for any use contrary to national regulations.