{"product_id":"athena-p400485100008-standard-bore-cylinder-kit-54mm-125cc-premium-2-stroke-top-end-rebuild-kit-with-forged-piston-gaskets-compatible-with-yamaha-yz125-2001-2004","title":"Athena P400485100008 Standard Bore Cylinder Kit (54mm, 125cc) - Premium 2-Stroke Top End Rebuild Kit with Forged Piston \u0026 Gaskets, Compatible with Yamaha YZ125 2001-2004","description":"RESTORE YOUR DIRT BIKE TO PEAK OEM PERFORMANCE Bring back the crisp throttle response, razor-sharp power delivery, and high-revving factory reliability of your 125cc two-stroke engine with the Athena Standard Bore Cylinder Kit (Part No. P400485100008), a premium OEM-style replacement package engineered and manufactured in Italy. Entirely cast from high-grade aluminum and treated with a specialized Motor-Nicksil (Nickel-Silicon) coating, this cylinder guarantees exceptional thermal dissipation, minimal friction, and optimal wear resistance to match or exceed original equipment standards across the entire RPM range. This complete bolt-on kit comes fully loaded with everything required for a flawless top-end rebuild—including a precision-machined 54mm standard bore cylinder, a high-performance forged piston assembly coated with molybdenum, premium rings, wrist pin, circlips, and a specific high-tightness gasket set—allowing you to drop compression losses and refresh your engine without requiring any machining or structural engine modifications to your factory crankcase.","brand":"Athena","offers":[{"title":"Default Title","offer_id":52658918883615,"sku":"P400485100008","price":898.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0813\/2195\/1519\/files\/P400485100008-1.jpg?v=1783363601","url":"https:\/\/massdepot.com\/products\/athena-p400485100008-standard-bore-cylinder-kit-54mm-125cc-premium-2-stroke-top-end-rebuild-kit-with-forged-piston-gaskets-compatible-with-yamaha-yz125-2001-2004","provider":"Mass Depot","version":"1.0","type":"link"}