S&S Cycle 124" Power Package Big Bore Kit

Unleash the full potential of your motorcycle engine with the S&S Cycle 124" Power Package Big Bore Kit. This comprehensive, bolt-on performance upgrade delivers a dramatic increase in displacement and power, transforming your ride without requiring complex case machining.

Description

Designed for motorcycle enthusiasts seeking a significant performance boost, the S&S Cycle 124" Power Package Big Bore Kit is a complete engine upgrade solution. Boasting an impressive 124" displacement, a 4.250" bore, a 4.375" stroke, and a potent 11.1:1 compression ratio, this kit provides a substantial power increase. The true bolt-on design means no case machining is required, making installation straightforward for a high-performance cylinder kit.

Every component in this S&S Cycle 124" Power Package is crafted for durability and optimal function. It features robust forged pistons and updated fins for enhanced cooling and a striking aesthetic. The included precision-machined billet aluminum oil pump and cam plate offer superior lubrication, with a remarkable 44% flow increase on the supply side and 58% on the scavenge side. Independent scavenge sections, debris screens, and a camchest magnet ensure clean oil delivery, while the adjustable pressure relief valve allows for fine-tuning even after installation. The kit also includes Quickee pushrods for easy assembly, hand-assembled tappets engineered for low leak-down rates and reduced valvetrain noise, and billet aluminum tappet cuffs with a hard anodized black coating for exceptional tappet stability in high-lift and high-RPM situations. At its heart is the S&S 550 camshaft, specifically designed for big bore applications, complemented by high-performance conical single wire valve springs capable of handling camshafts up to 0.605" lift, complete with top collars, keepers, valve seals, and bottom collars. Proudly made in the USA, this bolt-on power kit ensures top-tier quality and reliability for your motorcycle engine upgrade.

Features & Highlights

• Massive Power Upgrade: Transform your engine with the S&S Cycle 124" Power Package Big Bore Kit, delivering significant displacement and a potent 11.1:1 compression ratio for dramatic performance gains.
• Effortless Bolt-On Installation: Experience a true bolt-on upgrade that requires absolutely no case machining, simplifying the installation process and saving valuable time.
• Optimized Oil System Performance: Benefit from a precision-machined billet aluminum oil pump and cam plate featuring a 44% supply and 58% scavenge flow increase, independent scavenge sections, debris screens, and a camchest magnet for superior lubrication and engine protection.
• Enhanced Valvetrain Stability & Durability: Includes Quickee pushrods, hand-assembled tappets for reduced noise and low leak-down, and billet aluminum tappet cuffs for stable operation even in high-lift and high-RPM conditions.
• Comprehensive Performance Components: Equipped with an S&S 550 camshaft specifically designed for big bore applications and high-performance valve springs compatible with up to 0.605" lift for optimal engine dynamics.
• Premium American-Made Quality: Built with forged pistons and other components proudly manufactured in the USA, ensuring exceptional reliability and long-lasting performance.

Technical Specifications

• Type: Big Bore
• Model: Power Package
• Units: Kit
• Bore Size: 4.250"
• Color/Finish: Highlighted Fins, Black Granite
• Displacement: 124"
• Product Name: Performance Kit
• Stroke Length: 4.375"
• Cam Drive Type: Gear
• Cooling System: Oil Cooled
• Compression Ratio: 11.1:1
• Vendor Part Number: 310-1059C

Important to Know

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

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