{"product_id":"kit-cilindro-athena-big-bore-o58mm-yamaha-yz-125-2022-2027","title":"ATHENA BIG BORE CYLINDER KIT Ø58MM YAMAHA YZ 125 2022-2027","description":"\u003ch4\u003eAthena Big Bore Cylinder Kit Ø58 mm Yamaha YZ 125 2022-2027\u003c\/h4\u003e\u003cp\u003eThe \u003cstrong\u003eAthena Big Bore Ø58 mm cylinder kit for Yamaha YZ 125 from 2022 to 2027\u003c\/strong\u003e increases engine displacement to 144 cc, delivering greater power, stronger throttle response and progressive power delivery throughout the RPM range. Developed for motocross applications, it combines advanced engineering, high-quality materials and extensive dyno and track testing.\u003c\/p\u003e\u003cp\u003eThe aluminium cylinder features optimised geometries and intake and exhaust ports designed to improve gas flow and combustion efficiency. The water jackets are engineered to manage engine temperatures during intensive use. The modular cylinder head combines an aluminium outer shell with a bronze inner dome, allowing squish clearance and compression parameters to be adjusted. The self-centring dome, recessed into the cylinder, provides precise sealing and promotes consistent combustion. Exhaust power valves manufactured from hard-anodised Ergal 7075 combine low weight, heat resistance and durability. The kit also includes a gasket set for installation.\u003c\/p\u003e\u003cdiv\u003e\u003cstrong\u003eTechnical Features:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\u003cli\u003eBrand: Athena\u003c\/li\u003e\u003cli\u003eRange: Big Bore\u003c\/li\u003e\u003cli\u003eCompatibility: Yamaha YZ 125 2022-2027\u003c\/li\u003e\u003cli\u003eCylinder bore: 58 mm\u003c\/li\u003e\u003cli\u003eBore increase: +4 mm\u003c\/li\u003e\u003cli\u003eDisplacement: 144 cc\u003c\/li\u003e\u003cli\u003eCompression ratio: 15.4:1\u003c\/li\u003e\u003cli\u003eNet weight: 2.56 kg\u003c\/li\u003e\u003cli\u003eAluminium cylinder with optimised intake and exhaust ports\u003c\/li\u003e\u003cli\u003eModular cylinder head with aluminium outer shell and bronze inner dome\u003c\/li\u003e\u003cli\u003eSelf-centring dome for precise sealing\u003c\/li\u003e\u003cli\u003eHard-anodised Ergal 7075 exhaust power valves\u003c\/li\u003e\u003cli\u003eGasket set included\u003c\/li\u003e\u003c\/ul\u003e\u003cdiv\u003e\u003cstrong\u003eBenefits:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\u003cli\u003eIncreases displacement to 144 cc for greater power and acceleration\u003c\/li\u003e\u003cli\u003eSmooth, progressive power delivery throughout the RPM range\u003c\/li\u003e\u003cli\u003eImproved combustion efficiency through optimised cylinder geometry\u003c\/li\u003e\u003cli\u003eCooling system designed for demanding track conditions\u003c\/li\u003e\u003cli\u003eAdjustable squish and compression parameters through the modular head\u003c\/li\u003e\u003cli\u003eDurable, heat-resistant exhaust power valves\u003c\/li\u003e\u003cli\u003eGasket set included for installation\u003c\/li\u003e\u003c\/ul\u003e","brand":"ATHENA","offers":[{"title":"Default Title","offer_id":55153217077595,"sku":"P400485100101","price":1049.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0059\/0757\/8980\/files\/kit-cilindro-athena-big-bore-o58mm-yamaha-yz-125-2022-2027-P400485100101-kit.jpg?v=1794479299","url":"https:\/\/www.teammxag57.com\/en\/products\/kit-cilindro-athena-big-bore-o58mm-yamaha-yz-125-2022-2027","provider":"Team Mx AG57","version":"1.0","type":"link"}