S&S Cycle Engine Performance Kit - 4.125" Bore - 124ci - 900-0564

Transform your Twin Cam motorcycle into a powerhouse with the S&S Cycle 124" Hot Set Up® Engine Performance Kit. This comprehensive kit delivers a significant performance upgrade, converting your stock engine to a high-performance 124" displacement monster. Experience increased horsepower and torque throughout the RPM range, ensuring exhilarating acceleration and unmatched riding pleasure.

Description

This meticulously engineered kit is designed for non-balanced Twin Cam models and utilizes your stock crankcases for ease of installation. At the heart of this kit are the S&S Super Stock® 91 cc cylinder heads, paired with 4.125" bore cylinders and forged big bore flattop pistons. These components work in harmony with the S&S 4.625" stroke flywheel assembly to deliver a substantial increase in power. The S&S 640 gear drive Easy Start cams ensure smooth and reliable starts, while S&S premium tappets and adjustable pushrods guarantee optimal valve train performance. Roller rocker arms further enhance the engine's efficiency and durability. Note that the engine is 0.960" taller than stock. This kit includes all necessary hardware, gaskets, and detailed instructions for a hassle-free installation. The manifold mounting surfaces of the heads have been specially machined to fit a stock length manifold, ensuring a seamless fit with your stock EFI throttle body.

Features & highlights

• Converts your stock Twin Cam engine to a high-performance 124" powerhouse.
• Features S&S Super Stock® 91 cc cylinder heads for enhanced airflow and combustion.
• Includes forged big bore flattop pistons for increased strength and durability.
• S&S 640 gear drive Easy Start cams provide smooth and reliable starts.
• Complete kit includes all necessary hardware, gaskets, and instructions for straightforward installation.
• Optimized for use with stock EFI throttle bodies (recalibration required).
• Made in the USA with premium components for superior quality and performance.

Technical specifications

• Brand: S&S Cycle
• Displacement: 124"
• Bore Size: 4.125"
• Stroke Length: 4.625"
• Compression Ratio: 11.0:1
• Cam Drive Type: Gear
• Cylinder Head Volume: 91cc
• Type: Engine Performance Kit
• Color/Finish: Wrinkle Black, Powder Coated

Important to know

This kit is designed for non-balanced Twin Cam models. The EFI system must be recalibrated after installation. This kit does not include a fuel or ignition system. All clearances and assembly specifications will need to be checked during installation.