{"product_id":"s-s-cycle-129-power-package-engine-kit-for-107-m8","title":"S\u0026S Cycle 129\" Power Package Engine Kit for 107\" M8","description":"\u003cp\u003eElevate your riding experience with the \u003cstrong\u003eS\u0026amp;S Cycle 129\" M8 engine kit\u003c\/strong\u003e, a comprehensive power package designed to dramatically increase the performance of your Harley-Davidson Milwaukee-Eight 107\" engine. This bolt-on kit transforms your motorcycle's displacement to a formidable 129\", delivering a significant boost in horsepower and torque without requiring any case machining.\u003c\/p\u003e\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eThe S\u0026amp;S Cycle 129\" Power Package is engineered for motorcycle enthusiasts seeking a significant upgrade in power and reliability. This high-performance kit features a large 4.320\" bore cylinder paired with robust 11.0:1 forged pistons, providing the foundation for an impressive displacement increase from 107\" to 129\". Installation is straightforward, as it's a true bolt-on solution that retains your stock engine height and works seamlessly with original crankcases, eliminating the need for complex and costly case machining. At the heart of this system is the S\u0026amp;S oil pump\/cam plate, meticulously designed with independent scavenge sections for both the flywheel cavity and cam chest, ensuring optimal oil evacuation. Debris screens in both scavenge pickups and a magnet in the cam chest actively prevent contaminants from reaching the oil pump, extending engine life. You'll also benefit from increased oil flow capacity on both the feed and scavenge sides, alongside an adjustable pressure relief valve that can be fine-tuned even after installation. The valvetrain is upgraded with S\u0026amp;S Quickee pushrods and tubes, premium tappets, and billet aluminum hard-anodized black coated tappet cuffs for superior durability. High-performance conical single-wire valve springs are included, compatible with cams up to 0.605\" lift, making this kit adaptable for future modifications. The HPT496 cam is specifically designed for big bore applications, perfectly complementing the increased displacement. Completing the package are MLS (multi-layered steel) head gaskets for a reliable seal and a distinctive 129 cam cover badge. Proudly made in the USA, this kit maintains your original engine serial numbers and is compatible with both stock and S\u0026amp;S roller rocker arms, as well as first and second-generation stock valve springs.\u003c\/p\u003e\n\u003ch2\u003eFeatures \u0026amp; Highlights\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSignificant Displacement Increase:\u003c\/strong\u003e Transforms your 107\" Milwaukee-Eight engine to 129\" with a 4.320\" big bore cylinder and 11.0:1 forged pistons for a substantial power boost.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHassle-Free Bolt-On Installation:\u003c\/strong\u003e Designed as a direct fit, requiring no case machining and retaining stock engine height, making the upgrade process simpler and more cost-effective.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOptimized Oiling System:\u003c\/strong\u003e Features an S\u0026amp;S oil pump\/cam plate with independent scavenge sections, debris screens, a cam chest magnet, and increased flow capacity for superior lubrication and engine protection.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePremium Valvetrain Components:\u003c\/strong\u003e Includes S\u0026amp;S Quickee pushrods, premium tappets, billet aluminum tappet cuffs, and high-performance conical valve springs (up to 0.605\" lift) for enhanced durability and performance.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePurpose-Built HPT496 Cam:\u003c\/strong\u003e Engineered specifically for big bore applications, ensuring optimal valve timing and power delivery for the increased displacement.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComprehensive Compatibility:\u003c\/strong\u003e Works seamlessly with stock crankcases, stock and S\u0026amp;S roller rocker arms, and both generations of stock valve springs, while retaining original engine serial numbers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMade in the USA Quality:\u003c\/strong\u003e Manufactured with precision and pride in the United States, guaranteeing high-quality materials and craftsmanship.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003eProduct Name: Power Package\u003c\/li\u003e\n    \u003cli\u003eType: Engine Performance Kit\u003c\/li\u003e\n    \u003cli\u003eModel: HPT496 Series\u003c\/li\u003e\n    \u003cli\u003eDisplacement: 129\"\u003c\/li\u003e\n    \u003cli\u003eBore Size: 4.320\"\u003c\/li\u003e\n    \u003cli\u003eCompression Ratio: 11.0:1\u003c\/li\u003e\n    \u003cli\u003eCam Drive Type: Chain\u003c\/li\u003e\n    \u003cli\u003eCooling System: Oil Cooled\u003c\/li\u003e\n    \u003cli\u003eFeatures: Black Pushrod Tubes\u003c\/li\u003e\n    \u003cli\u003eColor\/Finish: Black, Non-Highlighted Fins\u003c\/li\u003e\n    \u003cli\u003eUnits: Kit\u003c\/li\u003e\n    \u003cli\u003eVendor Part Number: 310-1394\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"S\u0026s Cycle","offers":[{"title":"Default Title","offer_id":62381481689418,"sku":"09040180","price":3561.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0016\/9546\/files\/656f191449e00c3329e4865b85a874d4.webp?v=1781740244","url":"https:\/\/partsdenmark.com\/fr\/products\/s-s-cycle-129-power-package-engine-kit-for-107-m8","provider":"Parts Denmark","version":"1.0","type":"link"}