S&S Cycle 124" Power Package Big Bore Kit

Transform your motorcycle's performance with the S&S Cycle 124" Big Bore Power Package, a comprehensive bolt-on engine upgrade designed for extreme power and reliability. This complete kit delivers a massive 124 cubic inches of displacement, ensuring a significant boost in torque and horsepower for an exhilarating ride.

Description

Unleash the full potential of your Harley-Davidson with the S&S Cycle 124" Big Bore Power Package, a meticulously engineered motorcycle performance kit that elevates your engine's capabilities. This premium upgrade, proudly Made in the USA, is a true bolt-on solution, requiring no complicated case machining for installation. Designed with updated fins for improved heat dissipation, this kit ensures your engine runs cooler and more efficiently, even under demanding conditions. At its core, the package features robust forged pistons and an impressive 11.1:1 compression ratio, generating incredible power from its 4.250" bore and 4.375" stroke. The heart of this system includes a high-performance S&S 550 camshaft, specifically designed for big bore applications, working in harmony with high-performance conical valve springs capable of handling cam lifts up to 0.605".

The S&S Cycle 124" Power Package goes beyond just displacement, integrating a precision-machined billet aluminum oil pump and cam plate. This advanced oiling system boasts a remarkable 44% flow increase on the supply side and an even more impressive 58% increase on the scavenge side, ensuring optimal lubrication and engine longevity. Removable passage plugs allow for easy servicing, while independent scavenge sections for the flywheel cavity and camchest, complete with debris screens and a camchest magnet, actively protect your engine from harmful contaminants. The Quickee pushrods, hand-assembled tappets with close tolerances, and hard-anodized billet aluminum tappet cuffs work together to reduce valvetrain noise and maintain exceptional stability during high-lift and high-RPM situations, delivering a smoother, more powerful ride. This comprehensive bolt-on engine upgrade is the ultimate choice for riders seeking a significant boost in performance and reliability.

Features & Highlights

• Effortless Bolt-On Installation: Experience a straightforward upgrade with this complete kit, designed for direct installation without requiring any case machining.
• Massive 124 Cubic Inch Displacement: Achieve unparalleled power and torque with a significant increase in engine displacement and an aggressive 11.1:1 compression ratio.
• Optimized Oiling System: Features a precision-machined billet aluminum oil pump/cam plate with a 44% increase in supply flow and 58% increase in scavenge flow, plus advanced debris protection and adjustable pressure relief.
• High-Performance Valvetrain Components: Includes durable forged pistons, Quickee pushrods, and a performance-tuned S&S 550 camshaft paired with conical valve springs (up to 0.605" lift) for superior power delivery.
• Enhanced Valvetrain Stability & Quiet Operation: Hand-assembled tappets with close tolerances reduce noise, while billet aluminum tappet cuffs ensure stability during high lift and high RPM situations.
• Premium Quality Construction: Built with updated fins for improved cooling and proudly Made in the USA, ensuring exceptional craftsmanship and reliability.

Important to Know

• Not compatible with any Trike models.
• Intake and rocker cover gaskets are not included and must be purchased separately.