S&S Cycle Easy Start Camshaft 106-4840 for Twin Cam 1999-2006 with 640 Gear Drive

Camshaft - Easy Start - 640 Gear Drive - Twin Cam '99-'06 (except '06 Dyna)

The S&S Cycle Easy Start Camshaft (Part Number 106-4840) is designed to facilitate effortless engine startups by initially reducing crank compression. Once the engine reaches higher RPMs, the compression release lobe is centrifugally retracted, allowing the engine to operate with full compression and maintain optimal performance. This feature is particularly beneficial for vehicles with 95", 96", 103", and 110" engines that have compression ratios ranging from 10.5:1 to 11.5:1. The camshaft is engineered for high-performance applications within the strongest RPM range of 3000 to 6000 rpm, providing reliable power delivery and smooth operation. Made in the USA, this camshaft requires high-lift springs and adjustable pushrods for proper installation and performance. It is important for installers to verify coil bind, valve-to-valve clearance, and valve-to-piston clearance before installation to ensure proper fitment. Please note that this camshaft is not suitable for models equipped with OEM compression releases, emphasizing the need for proper compatibility checks. The S&S Cycle Easy Start camshaft offers a combination of ease of starting, high-performance, and durability for serious motorcycle enthusiasts looking to upgrade their Twin Cam engines from 1999 to 2006, excluding the 2006 Dyna models.

Features:

• Facilitates easy engine start by reducing initial crank compression

• Centrifugally retracts compression release lobe at higher RPMs for full compression operation

• Optimized for 95" to 110" engines with compression ratios between 10.5:1 and 11.5:1

• Designed for high RPM range of 3000 to 6000 rpm for peak performance

• Made in the USA with high-quality materials

• Requires high-lift springs and adjustable pushrods for installation

• Ensure proper clearance checks: coil bind, valve-to-valve, and valve-to-piston

• Not suitable for models with OEM compression releases