{"product_id":"athena-cylinder-kit-racing-stock-bore-with-head-p400485100102","title":"Athena Cylinder Kit Racing Stock Bore with Head P400485100102","description":"\u003cbr\u003e \u003cp\u003eThe latest-generation Yamaha YZ 125 sets the benchmark in the 125cc segment, featuring a powerful engine, responsive chassis, and precise power management. To further enhance these characteristics, Athena introduces the new \u003cstrong\u003eStandard Bore Racing Cylinder Kit\u003c\/strong\u003e, an advanced solution designed to optimize engine performance with race-proven components engineered for maximum power output.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eHigh-Performance Cylinder\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAt the core of this kit is a \u003cstrong\u003ehigh-performance aluminum cylinder\u003c\/strong\u003e, featuring precision-machined intake and exhaust ports for optimized gas flow and improved combustion efficiency. These modifications enhance power delivery, ensuring instant throttle response and increased performance across the entire RPM range. The advanced design minimizes turbulence, maximizing engine efficiency and thermal stability during high-intensity riding sessions.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRacing Head with Modular Bronze Insert\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTo ensure superior thermodynamic efficiency, the kit includes a \u003cstrong\u003eracing head with a modular bronze insert\u003c\/strong\u003e, engineered for optimal heat dissipation and enhanced resistance to high temperatures. The combustion chamber geometry has been specifically designed to increase the velocity of the air-fuel mixture, resulting in smoother power delivery and improved reliability under extreme conditions.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eLightweight Single-Ring Piston with Oil Dots\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe kit features a \u003cstrong\u003elightweight single-ring piston\u003c\/strong\u003e, designed to reduce reciprocating mass and improve engine responsiveness. The \u003cstrong\u003eOil Dot technology\u003c\/strong\u003e optimizes lubrication, reducing friction and extending component longevity. This results in smoother piston movement, improved mechanical efficiency, and enhanced power output with superior wear resistance.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eAdvantages of the Athena Standard Bore Racing Cylinder Kit\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e? \u003cstrong\u003eSuperior Performance\u003c\/strong\u003e – Optimized port design for improved power delivery and throttle response.\u003c\/p\u003e\u003cp\u003e? \u003cstrong\u003eAdvanced Heat Dissipation\u003c\/strong\u003e – Modular bronze insert for optimal thermal management.\u003c\/p\u003e\u003cp\u003e? \u003cstrong\u003eLightweight \u0026amp; Efficient\u003c\/strong\u003e – Single-ring piston with Oil Dot technology for reduced friction and increased efficiency.\u003c\/p\u003e\u003cp\u003e? \u003cstrong\u003eDurability \u0026amp; Reliability\u003c\/strong\u003e – Components engineered to withstand extreme racing conditions.\u003c\/p\u003e\u003cp\u003e? \u003cstrong\u003ePerfect Fitment\u003c\/strong\u003e – Precisely manufactured for seamless compatibility with OEM components.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eA Race-Ready Cylinder Kit\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eAthena Standard Bore Racing Cylinder Kit\u003c\/strong\u003e is the ultimate choice for riders seeking \u003cstrong\u003emaximum performance from their Yamaha YZ 125\u003c\/strong\u003e without compromise. Featuring cutting-edge design and high-quality materials, this kit provides a significant upgrade over stock components, ensuring \u003cstrong\u003esmoother power delivery, increased horsepower, and enhanced durability under the most demanding conditions\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTrust Athena technology to take your Yamaha YZ 125 to the next level and dominate the track with true racing performance!\u003c\/strong\u003e\u003c\/p\u003e\u003cstrong\u003e\u003cp\u003eDescription:\u003c\/p\u003e\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eOptimized port design for improved power delivery and throttle response.\u003c\/li\u003e\n\u003cli\u003eModular bronze insert ensures superior heat dissipation and thermal stability.\u003c\/li\u003e\n\u003cli\u003eLightweight single-ring piston reduces friction and enhances engine efficiency.\u003c\/li\u003e\n\u003cli\u003eRace-proven durability for extreme performance and long-lasting reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eBrand: \u003c\/strong\u003eAthena\u003cbr\u003e\u003cstrong\u003ePart Number: \u003c\/strong\u003eP400485100102\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eYamaha YZ125 2022-2026\u003c\/li\u003e\n\u003cli\u003eYamaha YZ125X 2023-2026\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eNote: Image is for reference only, actual product may vary slightly.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Athena","offers":[{"title":"Default Title","offer_id":45159809646671,"sku":"P400485100102-ATHENA-0426-ATH","price":965.03,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/7120\/7759\/files\/P400485100102_0bc122cb-6d85-4740-bdc4-0669550bba86.jpg?v=1777656893","url":"https:\/\/lionparts.com\/products\/athena-cylinder-kit-racing-stock-bore-with-head-p400485100102","provider":"Lionparts Powersports","version":"1.0","type":"link"}