{"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\u003eMajority of our listings are for a direct replacement for your original part.\u003c\/p\u003e\n\u003cp\u003eOur parts are made of quality and are designed to meet or exceed the original OEM Standards.\u003c\/p\u003e\n\u003cp\u003eOur products are often a cost effective alternative to genuine OEM Parts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note: \u003c\/strong\u003ethe models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\n\u003c\/body\u003e","brand":"AW Motorcycle Parts","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=1746685341","url":"https:\/\/n0jgtc-nz.myshopify.com\/products\/ref-56-w4950-a-wo","provider":"AW Motorcycle Parts","version":"1.0","type":"link"}