S&S Cycle 124" Big Bore Power Package Engine Kit

Transform your motorcycle's performance with the S&S Cycle 124" Big Bore Power Package Engine Kit. This comprehensive, bolt-on upgrade delivers an impressive 124 cubic inches of displacement, providing a significant boost in power and torque without requiring any case machining.

Description

Experience the ultimate in motorcycle engine upgrades with the S&S Cycle 124" Big Bore Power Package. Designed for enthusiasts seeking unparalleled performance, this complete kit is a true bolt-on solution, eliminating the need for complex and costly case machining. At its core are durable forged pistons, meticulously engineered for the increased power output of a 4.250" bore and 4.375" stroke, achieving a robust 11.1:1 compression ratio. The updated fins not only enhance the engine's aesthetic appeal with a black and highlighted finish but also improve cooling efficiency, crucial for high-performance applications. Proudly Made in the USA, this package ensures top-tier quality and reliability.

The kit integrates a high-performance oil pump and cam plate, precision-machined from billet aluminum to deliver superior oil flow – a 44% increase on the supply side and an astounding 58% increase on the scavenge side. Independent scavenge sections, removable passage plugs for servicing, debris screens, and a camchest magnet ensure optimal lubrication and debris management, extending engine life. The adjustable pressure relief valve allows for fine-tuning while installed. Paired with S&S Quickee pushrods and hand-assembled tappets, which reduce valve train noise and offer low leak-down rates, your engine will run smoother and quieter. Billet aluminum, hard-anodized black tappet cuffs provide enhanced stability for high-lift and high-RPM situations. The S&S 550 camshaft, specifically designed for big bore applications, works in harmony with the included high-performance conical single wire valve springs, compatible with camshafts up to 0.605" lift, ensuring a complete and optimized valve train solution.

Features & Highlights

• Effortless Power Upgrade: Achieve a massive 124 cubic inches of displacement with this direct bolt-on kit, requiring no case machining for a straightforward installation.
• Enhanced Durability & Performance: Features robust forged pistons and updated fins for improved engine cooling and a striking black and highlighted finish.
• Superior Oiling System: Includes a precision-machined billet aluminum oil pump/cam plate with 44% increased supply and 58% increased scavenge flow, independent scavenge sections, debris screens, and an adjustable pressure relief valve for optimal lubrication.
• Optimized Valve Train Components: Equipped with S&S Quickee pushrods, hand-assembled tappets for reduced noise and low leak-down, and billet aluminum tappet cuffs for high-RPM stability.
• Performance-Matched Camshaft & Springs: Features an S&S 550 camshaft designed for big bore applications, paired with high-performance conical single wire valve springs compatible with up to 0.605" lift.
• American Made Quality: Proudly manufactured in the USA, ensuring exceptional craftsmanship and reliability for your motorcycle.

Technical Specifications

• Type: Big Bore Kit
• Displacement: 124 cu. in.
• Bore Size: 4.250"
• Stroke Length: 4.375"
• Compression Ratio: 11.1:1
• Camshaft: S&S 550
• Valve Lift Compatibility: Up to 0.605"
• Cam Drive Type: Gear
• Cooling System: Oil Cooled
• Piston Type: Forged
• Finish: Black with Highlighted Fins

Important to Know

• Not for any Trike models.
• Intake/rocker cover gaskets are not included.