{"product_id":"piston-kit-98-99-yzf400-93-00-forged-wossner-8603d100","title":"PISTON KIT 98-99 YZF400 93.00, FORGED WOSSNER 8603D100","description":"The Wossner 93mm Bore Piston Kit (Part No. 8603D100) is a high-performance forged piston designed for Yamaha YZ400F and WR400F models. Built for superior strength and durability, it optimizes heat transfer within the combustion chamber and features an elliptical design for even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance.\n\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eHigh-strength forged piston construction\u003c\/li\u003e\n\t\u003cli\u003eOptimized heat transfer for improved combustion efficiency\u003c\/li\u003e\n\t\u003cli\u003eElliptical design for 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 Size: 93mm\u003c\/li\u003e\n\t\u003cli\u003eActual Bore Diameter: 92.95mm\u003c\/li\u003e\n\t\u003cli\u003eCompression Ratio: OEM\u003c\/li\u003e\n\t\u003cli\u003eOEM Compression Ratio: 11.0:1\u003c\/li\u003e\n\t\u003cli\u003eDisplacement: 290cc\u003c\/li\u003e\n\t\u003cli\u003eStroke: 61.20mm\u003c\/li\u003e\n\t\u003cli\u003eClearance: 0.06mm\u003c\/li\u003e\n\t\u003cli\u003eDome Volume: -4.80cm³\u003c\/li\u003e\n\t\u003cli\u003eCompression Height: 23.00mm\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\u003eLock P\/N: CW18\u003c\/li\u003e\n\t\u003cli\u003ePin P\/N: WP053\u003c\/li\u003e\n\t\u003cli\u003eRing Set P\/N: 930XSY\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 YZ400F (1998-1999)\u003c\/li\u003e\n\t\u003cli\u003eYamaha WR400F (1998-1999)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e","brand":"Wossner","offers":[{"title":"Default Title","offer_id":50691157917962,"sku":"56-W4649_100.WO","price":179.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0846\/0094\/6954\/files\/stock54759_1.jpg?v=1738253255","url":"https:\/\/store.phoenixmotos.com\/products\/piston-kit-98-99-yzf400-93-00-forged-wossner-8603d100","provider":"Phoenix Motos","version":"1.0","type":"link"}