{"product_id":"piston-kit-05-07-yzf250-77mm-wossner-8614db-3-ring","title":"PISTON KIT 05-07 YZF250 77mm, WOSSNER 8614DB 3-RING","description":"Wossner forged piston kit with a 77.01mm bore, designed for Yamaha WR250F, YZ250F, and Gas Gas EC250F models. This three-ring piston is engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, reducing localized pressure and piston collapse. Manufactured in Germany for durability and precision.\n\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eForged piston for superior strength and design\u003c\/li\u003e\n\t\u003cli\u003eThree-ring design for enhanced sealing and durability\u003c\/li\u003e\n\t\u003cli\u003eOptimized heat transfer to cylinder walls\u003c\/li\u003e\n\t\u003cli\u003eElliptical design for uniform bearing surface and even thrust load distribution\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: 77.01mm (+0.01mm oversize)\u003c\/li\u003e\n\t\u003cli\u003eStandard size piston (PN# 8614DB)\u003c\/li\u003e\n\t\u003cli\u003eLock Part Number: CW16\u003c\/li\u003e\n\t\u003cli\u003ePin Part Number: WP059\u003c\/li\u003e\n\t\u003cli\u003eRing Set Part Number: 770XAS\u003c\/li\u003e\n\t\u003cli\u003eDisplacement: 249 cm³\u003c\/li\u003e\n\t\u003cli\u003eStroke: 53.6mm\u003c\/li\u003e\n\t\u003cli\u003eClearance: 0.04mm\u003c\/li\u003e\n\t\u003cli\u003eWossner Compression Ratio: OEM\u003c\/li\u003e\n\t\u003cli\u003eOEM Compression Ratio: 12.50:1\u003c\/li\u003e\n\t\u003cli\u003eDome Volume: -4.50 cm³\u003c\/li\u003e\n\t\u003cli\u003eCompression Height: 22.20mm\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\u003eNot provided\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 WR250F (2005-2007)\u003c\/li\u003e\n\t\u003cli\u003eYamaha YZ250F (2005-2007)\u003c\/li\u003e\n\t\u003cli\u003eGas Gas EC250F (2010-2015)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e","brand":"Wossner","offers":[{"title":"Default Title","offer_id":50732157698314,"sku":"56-W189+00B.WO","price":184.55,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0846\/0094\/6954\/files\/stock53867_1.jpg?v=1738963138","url":"https:\/\/store.phoenixmotos.com\/products\/piston-kit-05-07-yzf250-77mm-wossner-8614db-3-ring","provider":"Phoenix Motos","version":"1.0","type":"link"}