S&S Cycle MR103 Gear Drive Camshaft Kit for Twin Cam '07-'17 and Dyna '06 – Easy Start Performance Upgrade

Camshaft Kit - Easy Start - MR103 Gear Drive - Twin Cam '07-'17 | Dyna '06

The S&S Cycle MR103 Gear Drive Camshaft Kit is designed to provide a seamless balance of power and ease of starting for Twin Cam models from 2007 to 2017 and Dyna models from 2006. This kit features an innovative compression release mechanism that reduces crank compression during startup, making cold starts smoother and less labor-intensive. Once the engine reaches higher RPMs, the centrifugally retracted compression release ensures the engine runs with full compression, delivering optimal performance without sacrificing power or efficiency. Crafted for engines with stock compression ratios up to 10.5:1, the kit is ideal for riders seeking increased power across the rpm range, especially between 2,500 and 5,500 rpm. This comprehensive package includes camshafts, a gear cover gasket, bearings, retaining ring, O-ring, threat lock, and detailed instructions, all manufactured in the USA for quality assurance. Compatible with stock, un-ported heads as well as S&S CNC ported heads, this kit is a versatile upgrade for many Harley-Davidson builds. Installation requires checking coil bind, valve-to-valve, and valve-to-piston clearances to ensure optimal operation. Note that this kit is not suitable for models equipped with OEM compression releases, making it essential to verify compatibility before installation.

The S&S Cycle MR103 camshaft kit is engineered to enhance engine performance while maintaining reliable start-up characteristics. Its bolt-in design simplifies installation for experienced mechanics and enthusiasts alike, providing a significant upgrade in power delivery and throttle response. Whether you’re looking to improve your Harley’s performance or simplify cold starts, this camshaft kit offers a reliable and efficient solution backed by S&S Cycle’s reputation for quality American-made parts.

• Compression release mechanism for easier starting
• Designed for engines with stock up to 10.5:1 compression ratios
• Enhanced power across 2,500 to 5,500 rpm
• Includes camshafts, gaskets, bearings, and installation hardware
• Compatible with stock and S&S CNC ported heads
• Made in the USA for quality assurance
• Requires clearance checks for installation
• Not suitable for OEM compression release models