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Upgrade your Milwaukee-Eight motorcycle with the S&S Cycle 128 Inch Power Package, part number 310-1106A, designed for optimal performance and durability. Crafted in the USA, this big bore kit extends engine displacement from 114 or 117 inches to 128 inches without requiring case machining, offering a significant boost in power and torque. The kit features 4-1/4 inch bore cylinders paired with 11:1 forged pistons, ensuring robust compression and longevity. An oil pump and cam plate, finished with a blue anodized coating, are included, with removable passage plugs for easy servicing and independent scavenge sections for the flywheel cavity and camchest, enhancing oil flow and reliability. The debris screens in both scavenge pickups and a magnet in the camchest help prevent debris from entering the oil pump, safeguarding engine components during high-performance operation. Increased oil flow capacity on both feed and scavenge sides maintains optimal lubrication under demanding conditions. The adjustable pressure relief valve allows fine-tuning of oil pressure while the unit is installed, ensuring consistent performance. Pushrods are upgraded with chrome pushrod tubes and S&S's Quikee pushrods, offering reliable operation. Premium S&S tappets and black-coated, hard-anodized tappet cuffs made of billet aluminum improve tappet stability during high-lift and high-rpm scenarios. The included S&S 550 cam is specifically designed for big bore applications, delivering enhanced power delivery. Supporting the high-performance setup, S&S valve springs with a conical single-wire design work with cams up to .605 inches lift, providing reliable valve operation at high RPM. This comprehensive package combines quality craftsmanship and advanced engineering to maximize your motorcycle’s performance with a sleek wrinkle black finish and non-highlighted fins for a stylish look.
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