{"product_id":"s-s-cycle-129-power-package-big-bore-kit-for-m8-3","title":"S\u0026S Cycle 129\" Power Package Big Bore Kit for M8","description":"\u003cp\u003eElevate your Harley-Davidson Milwaukee-Eight engine's performance to an exhilarating new level with the S\u0026amp;S Cycle M8 129\" Big Bore Kit. This comprehensive bolt-on power package is engineered to transform your 107\" M8 into a formidable 129\" powerhouse, delivering significant gains in horsepower and torque without requiring any complex case machining.\u003c\/p\u003e\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eDesigned for motorcycle enthusiasts seeking a substantial power upgrade, the S\u0026amp;S Cycle M8 129\" Big Bore Kit offers a robust solution for your 107\" Milwaukee-Eight engine. This high-performance engine kit boosts your displacement to 129\" through precision-engineered 4.32\" bore cylinders paired with durable 11.0:1 compression ratio forged pistons. The result is a dramatic increase in throttle response and acceleration, providing a more thrilling riding experience. Installation is simplified as this is a true bolt-on kit, eliminating the need for costly and time-consuming case machining. The kit includes an advanced S\u0026amp;S oil pump and cam plate, featuring a striking blue anodized finish. This system incorporates independent scavenge sections for both the flywheel cavity and cam chest, along with debris screens and a magnet in the cam chest, ensuring optimal oil circulation and protection against contaminants. With increased oil flow capacity on both feed and scavenge sides, and an adjustable pressure relief valve, your engine's lubrication is meticulously managed. Further enhancing performance are the Quickee pushrods, premium S\u0026amp;S tappets with billet aluminum, hard-anodized black coated tappet cuffs, and S\u0026amp;S 550 cams specifically designed for big bore applications. Complementing these are S\u0026amp;S valve springs, built to handle cam lifts up to 0.605\", featuring a high-performance conical single wire spring design. All necessary gaskets, bearings, and hardware are included for a seamless installation, allowing you to quickly get back on the road and experience the full potential of your M8 engine, proudly Made in the USA.\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Highlights\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMassive Displacement Increase:\u003c\/strong\u003e Transforms your 107\" Milwaukee-Eight engine into a powerful 129\" unit with 4.32\" bore cylinders and 11.0:1 compression forged pistons, delivering significant horsepower and torque gains.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffortless Bolt-On Installation:\u003c\/strong\u003e Engineered as a true bolt-on kit, eliminating the need for complicated and expensive case machining, making your upgrade process straightforward and efficient.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Oil System:\u003c\/strong\u003e Features an S\u0026amp;S oil pump\/cam plate with independent scavenge sections, debris screens, and a cam chest magnet, ensuring superior lubrication, filtration, and engine longevity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Valvetrain Components:\u003c\/strong\u003e Includes S\u0026amp;S 550 cams, Quickee pushrods, premium tappets with billet aluminum cuffs, and high-performance valve springs (up to 0.605\" lift) for reliable, high-RPM operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Kit for Convenience:\u003c\/strong\u003e Comes with all necessary gaskets, bearings, and hardware, providing a comprehensive package for a complete and hassle-free installation right out of the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProudly Made in the USA:\u003c\/strong\u003e Guarantees superior quality, precision engineering, and robust durability, reflecting S\u0026amp;S Cycle's commitment to American craftsmanship.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S Cycle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Performance Kit \/ Big Bore Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget Displacement:\u003c\/strong\u003e 129\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e 4.32\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke Length:\u003c\/strong\u003e 4-3\/8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 11.0:1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling System:\u003c\/strong\u003e Oil Cooled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCam Drive Type:\u003c\/strong\u003e Chain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Lift Capacity:\u003c\/strong\u003e Up to 0.605\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrod Tubes:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Finish:\u003c\/strong\u003e Highlighted Fins, Wrinkle Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Pump\/Cam Plate Finish:\u003c\/strong\u003e Blue Anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTappet Cuffs Material:\u003c\/strong\u003e Billet Aluminum, Hard-Anodized Black Coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS\u0026amp;S Vendor Part Number:\u003c\/strong\u003e 310-1225C\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eImportant to Know\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eFitment Restriction:\u003c\/strong\u003e This power package is \u003cem\u003enot\u003c\/em\u003e compatible with any Harley-Davidson Trike models.\u003c\/li\u003e\u003c\/ul\u003e","brand":"S\u0026s Cycle","offers":[{"title":"Default Title","offer_id":62381480739146,"sku":"09040166","price":4592.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0016\/9546\/files\/a397c96714d962cad7ae26a9a003f2f1.webp?v=1781740159","url":"https:\/\/partsdenmark.de\/products\/s-s-cycle-129-power-package-big-bore-kit-for-m8-3","provider":"Parts Denmark","version":"1.0","type":"link"}