{"product_id":"piston-kit-yfm400fw-00-06-forged-wossner-8901da-5gh-11631-00-00","title":"Piston Kit YFM400FW 00-06, Forged Wossner 8901DA 5GH-11631-00-00","description":"\u003cp\u003eThis Wossner piston kit features a standard 92.00mm bore with a measured diameter of 84.42mm, engineered for Yamaha YFM400FW Kodiak (2000–2006) and YFM4 Grizzly 400 (2007–2008) models. Built for durability and thermal efficiency, this forged piston is optimised for four-stroke engine performance in utility ATV applications.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003eForged piston construction for superior strength and reliability\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eAdvanced heat transfer design from combustion chamber to cylinder walls\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eElliptical profile promotes uniform bearing surface under thermal expansion\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eEven thrust load distribution reduces localised stress and prevents piston collapse\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eManufactured in Germany\u003c\/p\u003e \u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003eBore: 92.00mm\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eDiameter: 84.42mm\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eDisplay: 400 cm³\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eStroke: 70.50 mm\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eClearance: 0.08 mm\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eCompression Ratio (Wossner): 8.50:1\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eCompression Ratio (OEM): 10.50:1\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eDome Volume: -2.90 cm³\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eCompression Height: 26.90 mm\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eClips P\/N: CW20\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003ePin P\/N: WP052\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eRing Set P\/N: 845XSY\u003c\/p\u003e \u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eCross-Reference OEM Part Numbers\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003ePart No. 56-W9924.00A.WO\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eWossner Piston 8901DA\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e5GH-11631-00-00\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e40076M08450\u003c\/p\u003e \u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eVehicle Fitments\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003eYamaha YFM400FW Kodiak 2000–2006\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eYamaha YFM4 Grizzly 400 2007–2008\u003c\/p\u003e \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- venture-connect-compatibility:start --\u003e\n\u003csection class=\"venture-connect-compatibility\"\u003e\u003ch3\u003eVehicle Compatibility\u003c\/h3\u003e\n\u003cp\u003ePlease check the exact model and year before ordering.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eYFM KODIAK 400\u003c\/td\u003e\n\u003ctd\u003e2000-2008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYAMAHA\u003c\/td\u003e\n\u003ctd\u003eYFM GRIZZLY 400\u003c\/td\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\n\u003c!-- venture-connect-compatibility:end --\u003e","brand":"Wossner","offers":[{"title":"Default Title","offer_id":57506695020924,"sku":"56-W9924.00A.WO","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/3952\/8167\/files\/stock58138_1.jpg?v=1790487081","url":"https:\/\/radhouse.co.uk\/products\/piston-kit-yfm400fw-00-06-forged-wossner-8901da-5gh-11631-00-00","provider":"Radhouse","version":"1.0","type":"link"}