{"product_id":"piston-kit-14-15-yzf250-77-00-forged-wossner-8893da-1sm-11631-01-00","title":"Piston Kit 14-15 YZF250 77.00, Forged Wossner 8893DA, 1SM-11631-01-00","description":"\u003cp\u003eThis Wossner forged piston kit, part number 8893DA, features a standard 77mm bore with an actual piston size of 76.96mm. It is engineered for TM MX-F450 (2009–2010), MX-Fi450 (2011), and EN-Fi450 (2011) models. Manufactured in Germany, the piston is designed for high-performance four-stroke applications, offering superior heat transfer, strength, and pressure distribution due to its elliptical profile.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eForged construction for strength and long-lasting durability\u003c\/li\u003e \u003cli\u003eElliptical design for uniform expansion and thrust load balance\u003c\/li\u003e \u003cli\u003eOptimized for heat transfer in high-performance engines\u003c\/li\u003e \u003cli\u003eMade in Germany\u003c\/li\u003e \u003cli\u003eDirect OEM replacement\u003c\/li\u003e \u003cli\u003eEasy to install; professional installation recommended if unsure\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eBore Size: 77.00mm\u003c\/li\u003e \u003cli\u003eActual Piston Size: 76.96mm\u003c\/li\u003e \u003cli\u003eDisplacement: 249cm³\u003c\/li\u003e \u003cli\u003eStroke: 53.60mm\u003c\/li\u003e \u003cli\u003eClearance: 0.05mm\u003c\/li\u003e \u003cli\u003eDome Volume: -3.00cm³\u003c\/li\u003e \u003cli\u003eWossner Compression Ratio: 13.70:1\u003c\/li\u003e \u003cli\u003eOEM Compression Ratio: 13.50:1\u003c\/li\u003e \u003cli\u003eCompression Height: 20.20mm\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eCross-Reference OEM Part Numbers\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e40116M07700\u003c\/li\u003e \u003cli\u003e1SM-11631-01-00\u003c\/li\u003e \u003cli\u003eCW16 (Lock)\u003c\/li\u003e \u003cli\u003eWP087 (Pin)\u003c\/li\u003e \u003cli\u003e770XAS-2 (Ring Set)\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eVehicle Fitments\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eTM MX-F450 (2009–2010)\u003c\/li\u003e \u003cli\u003eTM MX-Fi450 (2011)\u003c\/li\u003e \u003cli\u003eTM EN-Fi450 (2011)\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\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eYZF X 250\u003c\/td\u003e\n\u003ctd\u003e2015-2019\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\u003e2015-2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eWR F 250\u003c\/td\u003e\n\u003ctd\u003e2015-2017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eYZ FX 250\u003c\/td\u003e\n\u003ctd\u003e2015-2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eYZ F 250\u003c\/td\u003e\n\u003ctd\u003e2014-2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eYZF X 250\u003c\/td\u003e\n\u003ctd\u003e2015-2016\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\u003e2015-2017\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\u003e2014-2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eYZF X 250\u003c\/td\u003e\n\u003ctd\u003e2014-2015\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\u003e2014-2017\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":57506583150972,"sku":"56-W4961.A.WO","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/3952\/8167\/files\/stock55422_1.jpg?v=1790480711","url":"https:\/\/radhouse.co.uk\/products\/piston-kit-14-15-yzf250-77-00-forged-wossner-8893da-1sm-11631-01-00","provider":"Radhouse","version":"1.0","type":"link"}