{"product_id":"s-s-cycle-129-power-package-big-bore-kit-for-m8-1","title":"S\u0026S Cycle 129\" Power Package Big Bore Kit for M8","description":"\u003cp\u003eThe \u003cstrong\u003eS\u0026amp;S Cycle 129\" Power Package Big Bore Kit\u003c\/strong\u003e is engineered to transform your 107\" Harley-Davidson M8 engine into a formidable 129\" powerhouse. This comprehensive bolt-on performance engine upgrade delivers a significant boost in displacement and power, all without the need for complex case machining.\u003c\/p\u003e\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eExperience an unparalleled boost in power and torque with the \u003cstrong\u003eS\u0026amp;S Cycle 129\" Power Package Big Bore Kit\u003c\/strong\u003e. Designed specifically for 107\" Harley-Davidson M8 models, this high-performance engine upgrade increases your engine's displacement to a massive 129\" with a substantial 4.32\" bore and a robust 11.0:1 compression ratio, utilizing durable forged pistons. The kit is a true bolt-on solution, eliminating the need for costly and time-consuming case machining. At its core, the package includes an advanced S\u0026amp;S oil pump\/cam plate, featuring a striking blue anodized finish and independent scavenge sections for both the flywheel cavity and cam chest, ensuring optimal oil circulation. Enhanced oil flow capacity on both the feed and scavenge sides, coupled with a magnet in the cam chest and debris screens, guarantees superior lubrication and engine longevity. Fine-tune your engine with the adjustable pressure relief valve, accessible even after installation. Complementing this, the kit provides S\u0026amp;S Quickee pushrods, premium tappets, and hard-anodized billet aluminum tappet cuffs. The included S\u0026amp;S 550 cams are specifically engineered for big bore applications, working in harmony with S\u0026amp;S valve springs capable of handling up to 0.605\" lift, featuring a high-performance conical single wire spring design. This complete package ensures not just a power increase, but also enhanced reliability and precision engineering, all proudly made in the USA.\u003c\/p\u003e\n\u003ch2\u003eFeatures \u0026amp; Highlights\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMassive Displacement Increase:\u003c\/strong\u003e Transforms your 107\" M8 engine into a potent 129\" powerhouse, providing a significant boost in horsepower and torque without requiring any complex case machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Power \u0026amp; Durability:\u003c\/strong\u003e Features 4.32\" bore cylinders and high-strength 11.0:1 compression ratio forged pistons, engineered for extreme performance and long-term reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Oil System:\u003c\/strong\u003e Includes an S\u0026amp;S oil pump\/cam plate with a striking blue anodized finish, independent scavenge sections, increased flow capacity, debris screens, and a cam chest magnet for superior lubrication and engine protection. An adjustable pressure relief valve allows for fine-tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Valvetrain Components:\u003c\/strong\u003e Equipped with S\u0026amp;S Quickee pushrods, premium tappets, and hard-anodized billet aluminum tappet cuffs, ensuring precise valve timing and exceptional durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Cam \u0026amp; Valve Springs:\u003c\/strong\u003e Features S\u0026amp;S 550 cams optimized for big bore setups, paired with high-performance conical single wire valve springs capable of supporting cams up to 0.605\" lift for aggressive power delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Bolt-On Kit \u0026amp; USA Made:\u003c\/strong\u003e Comes with all necessary gaskets, bearings, and hardware for straightforward installation, proudly manufactured in the USA for superior quality and craftsmanship.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: S\u0026amp;S Cycle\u003c\/li\u003e\n\u003cli\u003eProduct Type: Power Package Big Bore Kit\u003c\/li\u003e\n\u003cli\u003eEngine Compatibility: Harley-Davidson M8 (107\" to 129\")\u003c\/li\u003e\n\u003cli\u003eDisplacement: 129\"\u003c\/li\u003e\n\u003cli\u003eBore Size: 4.32\"\u003c\/li\u003e\n\u003cli\u003eStroke Length: 4-3\/8\"\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 11.0:1\u003c\/li\u003e\n\u003cli\u003ePiston Type: Forged\u003c\/li\u003e\n\u003cli\u003eCooling System: Oil Cooled\u003c\/li\u003e\n\u003cli\u003eCam Drive Type: Gear\u003c\/li\u003e\n\u003cli\u003eValve Lift Support: Up to 0.605\"\u003c\/li\u003e\n\u003cli\u003eCylinder Finish: Highlighted Fins, Wrinkle Black\u003c\/li\u003e\n\u003cli\u003eOil Pump\/Cam Plate Finish: Blue Anodized\u003c\/li\u003e\n\u003cli\u003ePushrod Tube Color: Black\u003c\/li\u003e\n\u003cli\u003eManufacturing: Made in the USA\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 310-1227C\u003c\/li\u003e\n\u003cli\u003eMPN: 09040158\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eImportant to Know\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNot for any Trike models.\u003c\/li\u003e\n\u003cli\u003eAll necessary gaskets, bearings, and hardware for bolt-on installation are included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"S\u0026s Cycle","offers":[{"title":"Default Title","offer_id":62381479493962,"sku":"09040158","price":5121.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0016\/9546\/files\/35639cec44771bd8c1d6e69eaf48ed50.webp?v=1781740138","url":"https:\/\/partsdenmark.com\/es\/products\/s-s-cycle-129-power-package-big-bore-kit-for-m8-1","provider":"Parts Denmark","version":"1.0","type":"link"}