{"product_id":"piston-kit-05-07-yzf250-77mm-wossner-8614da-3-ring-5nl-11631-20-00","title":"Piston Kit 05-07 YZF250 77mm, Wossner 8614DA 3-RING, 5NL-11631-20-00","description":"\u003cp\u003eWossner forged piston kit with a 77mm bore, designed for Yamaha WR250F, YZ250F, and Gas Gas EC250F models. This three-ring piston is engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, reducing localized pressure and piston collapse. Manufactured in Germany for durability and precision.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eForged piston for superior strength and design\u003c\/li\u003e \u003cli\u003eThree-ring design for enhanced sealing and durability\u003c\/li\u003e \u003cli\u003eOptimized heat transfer to cylinder walls\u003c\/li\u003e \u003cli\u003eElliptical design for uniform bearing surface and even thrust load distribution\u003c\/li\u003e \u003cli\u003eManufactured in Germany\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eBore: 77mm\u003c\/li\u003e \u003cli\u003eStandard size piston (PN# 8614DA)\u003c\/li\u003e \u003cli\u003eLock Part Number: CW16\u003c\/li\u003e \u003cli\u003ePin Part Number: WP070\u003c\/li\u003e \u003cli\u003eRing Set Part Number: 770XAS\u003c\/li\u003e \u003cli\u003eDisplacement: 249 cm³\u003c\/li\u003e \u003cli\u003eStroke: 53.6mm\u003c\/li\u003e \u003cli\u003eClearance: 0.04mm\u003c\/li\u003e \u003cli\u003eWossner Compression Ratio: OEM\u003c\/li\u003e \u003cli\u003eOEM Compression Ratio: 12.50:1\u003c\/li\u003e \u003cli\u003eDome Volume: -4.50 cm³\u003c\/li\u003e \u003cli\u003eCompression Height: 22.20mm\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eCross-Reference OEM Part Numbers\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e5NL-11631-20-00\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eVehicle Fitments\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eYamaha WR250F (2005-2007)\u003c\/li\u003e \u003cli\u003eYamaha YZ250F (2005-2007)\u003c\/li\u003e \u003cli\u003eGas Gas EC250F (2010-2015)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- venture-connect-compatibility:start --\u003e\n\u003csection class=\"venture-connect-compatibility\"\u003e\u003ch3\u003eVehicle Compatibility\u003c\/h3\u003e\n\u003cp\u003ePlease check the exact model and year before ordering.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGAS-GAS\u003c\/td\u003e\n\u003ctd\u003eEC F 250\u003c\/td\u003e\n\u003ctd\u003e2010-2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eWRF 250\u003c\/td\u003e\n\u003ctd\u003e2005-2013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eYZF 250\u003c\/td\u003e\n\u003ctd\u003e2005-2007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eWRF 250\u003c\/td\u003e\n\u003ctd\u003e2005-2007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\n\u003c!-- venture-connect-compatibility:end --\u003e","brand":"Wossner","offers":[{"title":"Default Title","offer_id":57506530886012,"sku":"56-W189+00A.WO","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/3952\/8167\/files\/stock53866_1.jpg?v=1790477279","url":"https:\/\/radhouse.co.uk\/products\/piston-kit-05-07-yzf250-77mm-wossner-8614da-3-ring-5nl-11631-20-00","provider":"Radhouse","version":"1.0","type":"link"}