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The S&S Cycle 330-0100 Twin Cam 551G gear drive camshaft kit is engineered for engines with 96 to 106 cubic inch displacement and a compression ratio ranging from 9:1 to 9:9. This bolt-in cam set is designed for both stock and mildly modified touring motorcycles, offering a straightforward upgrade to enhance engine performance. The kit's reversing of the rear cam's rotation direction creates additional operating clearance between cam lobes, facilitating higher cam lifts without interference. This results in more power across the entire RPM spectrum, with notable gains in low and midrange torque, especially from 1,000 to 4,000 RPM. The design also improves valve timing accuracy by eliminating timing chain lash and accommodating loosely fit stock chains, thereby optimizing overall engine efficiency.
Installation requires removal of material from the inner surface of the stock gear cover and the use of professional tools such as a hydraulic press. It is essential to replace cam bearings and gaskets during installation to ensure proper function. For optimal results, S&S recommends using an adjustable pushrod/cover kit. The kit includes inner and outer gears, bearings, gaskets, and detailed instructions, providing a comprehensive upgrade package. Due to the gear drive nature of this kit, users may experience increased valve train noise, which is normal for gear-driven systems. Proper clearance checks, including coil bind, valve-to-valve, and valve-to-piston, are critical before final assembly to prevent potential engine damage. Made in the USA, the S&S Cycle 330-0100 camshaft kit offers a robust solution for riders seeking enhanced performance and reliability in their Twin Cam engines.
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