{"product_id":"ref-56-w503-050-wo","title":"WOSSNER 56.5mm PISTON KIT YAMAHA YZ125 1983 \u0026 1985","description":"\u003cbody\u003e\n\n\n\n\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eThis Wossner piston kit features a 56.50mm bore (+0.01 oversize) and is designed for Yamaha YZ125 models from 1983 and 1985. Wossner forged pistons are engineered to offer superior strength and efficient heat transfer from the combustion chamber to the cylinder walls. The elliptical design ensures a uniform bearing surface under heat expansion, distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003eForged construction for increased strength\u003c\/li\u003e \t\u003cli\u003eOptimized heat transfer to cylinder walls\u003c\/li\u003e \t\u003cli\u003eElliptical design for uniform bearing surface and thrust load distribution\u003c\/li\u003e \t\u003cli\u003eMade in Germany\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003eBore Size: 56.50mm\u003c\/li\u003e \t\u003cli\u003eBore (Actual Measured): 56.44mm\u003c\/li\u003e \t\u003cli\u003eDisplay Volume: 83 cm³\u003c\/li\u003e \t\u003cli\u003eStroke: 84.00mm\u003c\/li\u003e \t\u003cli\u003eClearance: 0.06mm\u003c\/li\u003e \t\u003cli\u003eCompression Ratio (Wossner): 2-stroke\u003c\/li\u003e \t\u003cli\u003eCompression Ratio (OEM): 2-stroke\u003c\/li\u003e \t\u003cli\u003eCompression Height: 30.80mm\u003c\/li\u003e \t\u003cli\u003eLock Part Number: CW16\u003c\/li\u003e \t\u003cli\u003ePin Part Number: WP036\u003c\/li\u003e \t\u003cli\u003eRing Set Part Number: RSB5600\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eCross-Reference OEM Part Numbers\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003e39W-11-630-00-00\u003c\/li\u003e \t\u003cli\u003e55Y-11631-00-94\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eVehicle Fitments\u003c\/strong\u003e\u003c\/p\u003e  \u003cul\u003e \t\u003cli\u003eYamaha YZ125 1983\u003c\/li\u003e \t\u003cli\u003eYamaha YZ125 1985\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":55594846290294,"sku":"REF 56-W503+050.WO","price":114.82,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/7032\/3318\/files\/stock55505_1.jpg?v=1746721156","url":"https:\/\/n0jgtc-nz.myshopify.com\/products\/ref-56-w503-050-wo","provider":"AW Motorcycle Parts","version":"1.0","type":"link"}