{"product_id":"piston-kit-yzf-wrf-250-3-ring-wossner-8712db-08-13-77mm","title":"PISTON KIT YZF WRF 250 3-RING, WOSSNER 8712DB 08-13 77mm","description":"\u003cp\u003eWossner forged piston kit with a 77.01mm bore and 76.97mm diameter, designed for Yamaha YZ250F and WR250F models. This 3-ring piston is engineered for durability and high performance, featuring superior strength and design. Manufactured in Germany, it ensures optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse.\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\u003eForged construction for superior strength\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eOptimized heat transfer for efficient combustion\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eElliptical design for uniform load distribution\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e3-ring piston design for durability\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: 77.01mm\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eDiameter: 76.97mm\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eDisplay (cm³): 249\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eStroke (mm): 53.60\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eClearance (mm): 0.04\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eWossner Compression Ratio: OEM\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eOEM Compression Ratio: 13.50:1\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eDome Volume (cm³): -2.90\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eCompression Height (mm): 22.20\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\u003eWossner Piston Yamaha YZ250F (PN# 8712DB)\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eLock P\/N: CW16\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003ePin P\/N: WP059\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eRing Set P\/N: 770XAS-2\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eRod P\/N: P4005\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 (2008-2013)\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003eYamaha WR250F (2008-2013)\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e","brand":"ORO2U","offers":[{"title":"Default Title","offer_id":57151081742709,"sku":"56-W240+00B.WO","price":202.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5011\/6136\/files\/stock54102_1.jpg?v=1778374093","url":"https:\/\/www.smxoffroad.com\/fr\/products\/piston-kit-yzf-wrf-250-3-ring-wossner-8712db-08-13-77mm","provider":"SMXOFFROAD Ltd","version":"1.0","type":"link"}