{"product_id":"piston-kit-01-04-yzf250-77-00-forged-wossner-8559da-3-ring-5nl-11631-10-00","title":"PISTON KIT 01-04 YZF250 77.00, FORGED WOSSNER 8559DA 3-RING, 5NL-11631-10-00","description":"\u003cp\u003eWossner forged piston kit designed for Yamaha YZ250F and WR250F models, featuring a 77mm bore and 76.95mm size with a three-ring design. Manufactured in Germany, this piston is engineered to enhance heat transfer, ensuring uniform expansion and even thrust load distribution. The elliptical design prevents localized pressure and piston collapse, making it ideal for high-performance applications.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cbr\u003e\t\u003cli\u003eHigh-strength forged piston for durability\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eOptimized heat transfer for improved combustion efficiency\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eElliptical design to ensure uniform expansion and reduced localized pressure\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eThree-ring design for enhanced sealing and performance\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eManufactured in Germany\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cbr\u003e\t\u003cli\u003eBore: 77mm\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eSize: 76.95mm\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003ePart Number: 8559DA\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eCompression Ratio: OEM\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eOEM Compression Ratio: 12.50:1\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eLock Part Number: CW16\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003ePin Part Number: WP059\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eRing Set Part Number: 770XAS\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eDisplacement: 249 cm³\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eStroke: 53.6mm\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eClearance: 0.04mm\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eDome Volume: -4.70 cm³\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eCompression Height: 22.20mm\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eTheoretical Weight: Not specified\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eCross-Reference OEM Part Numbers\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cbr\u003e\t\u003cli\u003e5NL-11631-10-00\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eVehicle Fitments\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cbr\u003e\t\u003cli\u003eYamaha YZ250F (2001-2004)\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eYamaha WR250F (2001-2004)\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e","brand":"ORO2U","offers":[{"title":"Default Title","offer_id":57153010073973,"sku":"56-W4738+00A.WO","price":202.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5011\/6136\/files\/stock54961_1.jpg?v=1778461566","url":"https:\/\/www.smxoffroad.com\/products\/piston-kit-01-04-yzf250-77-00-forged-wossner-8559da-3-ring-5nl-11631-10-00","provider":"SMXOFFROAD Ltd","version":"1.0","type":"link"}