{"product_id":"piston-kit-5-60mm-big-bore-72-00mm-yamaha-yz-2t-250-2003-2025-athena-s4f07200006b","title":"PISTON KIT +5.60mm BIG BORE 72.00mm YAMAHA YZ 2T 250 2003 - 2025 ATHENA S4F07200006B","description":"\u003cp\u003eAthena 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.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eForged piston with high-performance aluminum alloy construction\u003c\/li\u003e\n\t\u003cli\u003eCNC-machined for dimensional accuracy within 0.01 mm\u003c\/li\u003e\n\t\u003cli\u003eHigh silicon content for strength and durability\u003c\/li\u003e\n\t\u003cli\u003eSmooth profile for optimized flow and combustion\u003c\/li\u003e\n\t\u003cli\u003eSome models include molybdenum disulfide skirt coating for reduced friction\u003c\/li\u003e\n\t\u003cli\u003ePiston rings with low-friction design for improved performance\u003c\/li\u003e\n\t\u003cli\u003eJapanese-made piston rings with wear-resistant coatings (PVD or chromium nitride)\u003c\/li\u003e\n\t\u003cli\u003eIncludes piston, pin, circlips, and piston rings\u003c\/li\u003e\n\t\u003cli\u003eDesigned exclusively for competitive use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eBig End Pin Diameter: 18x13x53.5 mm\u003c\/li\u003e\n\t\u003cli\u003eBore Diameter: 71.96 mm\u003c\/li\u003e\n\t\u003cli\u003eCompression Ratio: 16.0:1\u003c\/li\u003e\n\t\u003cli\u003eDisplacement: 250 cc\u003c\/li\u003e\n\t\u003cli\u003eNet Weight: 0.34 kg\u003c\/li\u003e\n\t\u003cli\u003eNumber of Segments: 3\u003c\/li\u003e\n\t\u003cli\u003ePiston Head Type: Domed\u003c\/li\u003e\n\t\u003cli\u003ePiston Pin Type: Biconical\u003c\/li\u003e\n\t\u003cli\u003ePiston Type: Forged\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCross-Reference OEM Part Numbers\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eS4F07200006A Piston Kit 71.95\u003c\/li\u003e\n\t\u003cli\u003eS41316257 Rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVehicle Fitments\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eYamaha YZ 250 2T (2003-2025)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Athena","offers":[{"title":"Default Title","offer_id":51396978016522,"sku":"56-k156.72.pib","price":204.65,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0898\/2757\/4026\/files\/image-1-6E27DA70-C5C9-4273-AB79-27F2CA90CB7C_56-K156.72.PIB.jpg?v=1750759164","url":"https:\/\/2bros-mx.com\/products\/piston-kit-5-60mm-big-bore-72-00mm-yamaha-yz-2t-250-2003-2025-athena-s4f07200006b","provider":"2bros-mx.com","version":"1.0","type":"link"}