{"product_id":"ref-56-w4950-a-wo","title":"WOSSNER 74mm PISTON KIT YAMAHA YFM250R RAPTOR 08-13, XT250 13-18","description":"\u003cbody\u003e\n\n\n\n\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eThe Wossner 8724DA forged piston kit with a 74.00mm bore is designed for Yamaha YFM250R Raptor (2008–2013) and YBR250 (2008–2012). Manufactured in Germany, this high-compression piston enhances strength and heat transfer performance. Its elliptical shape ensures even pressure distribution during thermal expansion, reducing the risk of piston failure.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003eForged high-compression piston for durability and performance\u003c\/li\u003e \t\u003cli\u003eEngineered for efficient heat transfer to cylinder walls\u003c\/li\u003e \t\u003cli\u003eElliptical design ensures uniform pressure distribution during heat expansion\u003c\/li\u003e \t\u003cli\u003eReduces localized stress and risk of piston collapse\u003c\/li\u003e \t\u003cli\u003eManufactured in Germany\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003eBore: 74.00 mm\u003c\/li\u003e \t\u003cli\u003eActual Bore Diameter: 73.95 mm\u003c\/li\u003e \t\u003cli\u003eHub Stroke: 58.00 mm\u003c\/li\u003e \t\u003cli\u003eClearance: 0.05 mm\u003c\/li\u003e \t\u003cli\u003eCompression Height: 23.50 mm\u003c\/li\u003e \t\u003cli\u003eDome Volume: +2.40 cm³\u003c\/li\u003e \t\u003cli\u003eWossner Compression Ratio: 12.00:1\u003c\/li\u003e \t\u003cli\u003eOEM Compression Ratio: 9.50:1\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eCross-Reference OEM Part Numbers\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003ePiston: 8724DA\u003c\/li\u003e \t\u003cli\u003eLock: CW17\u003c\/li\u003e \t\u003cli\u003ePin: WP083\u003c\/li\u003e \t\u003cli\u003eRing Set: 740XDS\u003c\/li\u003e \t\u003cli\u003ePart No.: 56-W4950.A.WO\u003c\/li\u003e \t\u003cli\u003eOEM Reference: 1S4-11631-20-A0, 40078M07400\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eVehicle Fitments\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003eYamaha YFM250R Raptor 2008–2013\u003c\/li\u003e \t\u003cli\u003eYamaha YBR250 2008–2012\u003c\/li\u003e \u003c\/ul\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\n\u003c\/body\u003e","brand":"Wossner","offers":[{"title":"Default Title","offer_id":55594837705078,"sku":"REF 56-W4950.A.WO","price":162.17,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/7032\/3318\/files\/stock55371_1.jpg?v=1783536121","url":"https:\/\/www.awmotorcycleparts.co.uk\/products\/ref-56-w4950-a-wo","provider":"AW Motorcycle Parts","version":"1.0","type":"link"}