TOP END PISTON & GASKET KIT 77MM YAMAHA WR/YZ 250 16-18, ATHENA P5F0770187009C, SET C

Athena Top End Piston and Gasket Kit

This Athena Top End Piston Kit provides a perfectly matched forged 4-stroke piston and top end gasket kit for optimal engine performance and reliability. Athena meticulously studies, develops, and tests all piston technologies and materials in-house, while also engineering compatible gaskets for a seamless integration. This kit ensures high performance and maximum dependability after a piston replacement.

Key Features:

• Forged Piston Construction: Made from a special high-performance aluminum alloy with a high silicon content, offering enhanced durability and excellent performance comparable to original equipment.
• Advanced Manufacturing: Pistons are produced using state-of-the-art numerical control (CNC) machines with a reverse extrusion process.
• Friction Reduction: Some piston skirts feature a molybdenum disulfide coating applied by screen printing to further reduce friction, enhancing performance and lifespan.
• High-Quality Piston Rings: Included piston rings are Made in Japan and feature wear-resistant coatings (PVD or chromium nitride) for increased longevity and reduced friction with the cylinder.
• Reliable Gasket Kit: Based on over 40 years of industry experience, Athena gaskets are developed with constant technological advancement and produced to strict manufacturer parameters.
• Precision Cutting: Latest generation lasers are used to guarantee perfect cutting quality for the gaskets.
• Optimized Sealing: Athena utilizes a wide range of raw materials, applies surface treatments to correct irregularities, and employs material stress-relieving processes to improve sealing in critical areas.

Technical Specifications:

• Piston Type: Forged
• Bore Diameter: 76.97 mm
• Compression Ratio: 13.5:1
• Number Of Segments: 2
• Piston Pin Type: Standard
• Big End Pin Diameter: 16x9,5x38 mm
• Compression Height: 20.20 mm
• Displacement: 250 cc