{"product_id":"ref-56-w582-050-wo","title":"PISTON KIT 1989 YZ125 56.50 WOSSNER 8131D050 YAMAHA MX","description":"\u003cbody\u003e\n\n\n\n\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWossner Forged Piston Kit 56.50mm Bore – Yamaha YZ125 1989 (8131D050 +0.50)\u003c\/strong\u003e\u003cbr\u003e This Wossner forged piston kit with a +0.50mm oversize bore (actual 56.44mm) is developed for the 1989 Yamaha YZ125. Designed for high-performance 2-stroke engines, the forged piston offers superior strength and heat transfer capabilities. The elliptical shape ensures balanced load distribution during thermal expansion, effectively minimising localised pressure and reducing the risk of structural failure. Made in Germany for consistent precision and performance.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003e \t\u003cp\u003eHigh-strength forged aluminium piston for demanding 2-stroke use\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eEnhanced heat transfer from combustion chamber to cylinder walls\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eElliptical design ensures uniform bearing surface under expansion\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eSuitable for 2-stroke engine performance requirements\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003ePrecision engineered in Germany\u003c\/p\u003e \t\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003e \t\u003cp\u003eBore Size: 56.50mm (+0.50 oversize)\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eActual Bore: 56.44mm\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eCompression Height: 28.00mm\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eClearance: 0.06mm\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eStroke: 50.00mm\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eDisplacement: 123 cm³\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eWossner Compression Ratio: 2-stroke\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eOEM Compression Ratio: 2-stroke\u003c\/p\u003e \t\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eCross-Reference OEM Part Numbers\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003e \t\u003cp\u003eWossner Piston: 8131D050\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eRing Set: RSB5650\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eLock: CW16\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003ePin: WP036\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eRod: P2047\u003c\/p\u003e \t\u003c\/li\u003e \t\u003cli\u003e \t\u003cp\u003eInternal Reference: 56-W582+050.WO\u003c\/p\u003e \t\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eVehicle Fitments\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003e \t\u003cp\u003e1989 Yamaha YZ125\u003c\/p\u003e \t\u003c\/li\u003e \u003c\/ul\u003e\n\u003cp\u003eMajority of our listings are for a direct replacement for your original part.\u003c\/p\u003e\n\u003cp\u003eOur parts are made of quality and are designed to meet or exceed the original OEM Standards.\u003c\/p\u003e\n\u003cp\u003eOur products are often a cost effective alternative to genuine OEM Parts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note: \u003c\/strong\u003ethe models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\n\u003c\/body\u003e","brand":"AW Motorcycle Parts","offers":[{"title":"Default Title","offer_id":55594868474230,"sku":"REF 56-W582+050.WO","price":126.77,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/7032\/3318\/files\/stock55943_1.jpg?v=1746766069","url":"https:\/\/n0jgtc-nz.myshopify.com\/products\/ref-56-w582-050-wo","provider":"AW Motorcycle Parts","version":"1.0","type":"link"}