{"product_id":"piston-kit-xr400-trx400-86-50-forged-wossner-8604d150","title":"PISTON KIT XR400 TRX400 86.50, FORGED WOSSNER 8604D150","description":"Wössner forged piston kit with an 86.50mm bore, designed for Honda XR400R motorcycles and TRX400 series ATVs. Manufactured in Germany, this high-performance piston enhances strength, heat transfer, and durability. The elliptical design ensures uniform bearing surface distribution, reducing localized pressure and preventing piston collapse.\n\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eForged construction for superior strength 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 under heat expansion\u003c\/li\u003e\n\t\u003cli\u003eIncreased compression ratio for improved engine performance\u003c\/li\u003e\n\t\u003cli\u003eMade 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: 86.50mm (86.44mm actual)\u003c\/li\u003e\n\t\u003cli\u003eDisplay: 397 cm³\u003c\/li\u003e\n\t\u003cli\u003eStroke: 70.00mm\u003c\/li\u003e\n\t\u003cli\u003eClearance: 0.06mm\u003c\/li\u003e\n\t\u003cli\u003eWössner Compression Ratio: 11.00:1\u003c\/li\u003e\n\t\u003cli\u003eOEM Compression Ratio: 10.00:1\u003c\/li\u003e\n\t\u003cli\u003eDome Volume: +3.20 cm³\u003c\/li\u003e\n\t\u003cli\u003eCompression Height: 26.20mm\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\u003eWössner Piston: 8604D150\u003c\/li\u003e\n\t\u003cli\u003eLock: CW20\u003c\/li\u003e\n\t\u003cli\u003ePin: WP052\u003c\/li\u003e\n\t\u003cli\u003eRing Set: 865XSY\u003c\/li\u003e\n\t\u003cli\u003eRod: P4021\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\u003eHonda XR400R (1996-2004)\u003c\/li\u003e\n\t\u003cli\u003eHonda TRX400EX (1999-2008)\u003c\/li\u003e\n\t\u003cli\u003eHonda TRX400X (2009-2012)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e","brand":"Wossner","offers":[{"title":"Default Title","offer_id":50689447952650,"sku":"56-W4606+150.WO","price":220.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0846\/0094\/6954\/files\/stock54719_1.jpg?v=1738238403","url":"https:\/\/store.phoenixmotos.com\/products\/piston-kit-xr400-trx400-86-50-forged-wossner-8604d150","provider":"Phoenix Motos","version":"1.0","type":"link"}