{"product_id":"oro2u-56-w241-00c-wo-255161","title":"PISTON KIT YZF WRF 250 2-RING, WOSSNER 8713DC 08-13 77mm","description":"\u003cp\u003eWossner forged piston kit with a 77.02mm bore and 76.98mm diameter, designed for Yamaha YZ250F and WR250F models. This 2-ring piston is engineered for 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\n\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eForged construction for superior strength\u003c\/li\u003e\n\t\u003cli\u003eOptimized heat transfer for efficient combustion\u003c\/li\u003e\n\t\u003cli\u003eElliptical design for uniform load distribution\u003c\/li\u003e\n\t\u003cli\u003e2-ring piston design for performance applications\u003c\/li\u003e\n\t\u003cli\u003eIncreased compression ratio for improved power output\u003c\/li\u003e\n\t\u003cli\u003eManufactured in Germany\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eBore: 77.02mm\u003c\/li\u003e\n\t\u003cli\u003eDiameter: 76.98mm\u003c\/li\u003e\n\t\u003cli\u003eDisplay (cm³): 249\u003c\/li\u003e\n\t\u003cli\u003eStroke (mm): 53.60\u003c\/li\u003e\n\t\u003cli\u003eClearance (mm): 0.04\u003c\/li\u003e\n\t\u003cli\u003eWossner Compression Ratio: 14.10:1\u003c\/li\u003e\n\t\u003cli\u003eOEM Compression Ratio: 13.50:1\u003c\/li\u003e\n\t\u003cli\u003eDome Volume (cm³): -5.00\u003c\/li\u003e\n\t\u003cli\u003eCompression Height (mm): 22.50\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCross-Reference OEM Part Numbers\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eWossner Piston Yamaha YZ250F (PN# 8713DC)\u003c\/li\u003e\n\t\u003cli\u003eLock P\/N: CW16\u003c\/li\u003e\n\t\u003cli\u003ePin P\/N: WP059\u003c\/li\u003e\n\t\u003cli\u003eRing Set P\/N: 770XAS\u003c\/li\u003e\n\t\u003cli\u003eRod P\/N: P4005\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVehicle Fitments\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eYamaha YZ250F (2008-2013)\u003c\/li\u003e\n\t\u003cli\u003eYamaha WR250F (2008-2013)\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Wossner","offers":[{"title":"Default Title","offer_id":61520169501006,"sku":"56-W241+00C.WO","price":178.51,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/6502\/5358\/files\/stock54107_1.jpg?v=1793706861","url":"https:\/\/btpsouthwest.uk\/products\/oro2u-56-w241-00c-wo-255161","provider":"BTP - Braydon Trailers \u0026 Powersports | Sales, Hire, Parts, Servicing \u0026 Repairs","version":"1.0","type":"link"}