S&S Cycle Easy Start Camshaft 635 H.O. Gear Drive for Twin Cam 1999-2006 (excluding Dyna) - Part Number 330-0438

Camshaft - Easy Start - 635 H.O. Gear Drive - Twin Cam '99-'06 (except '06 Dyna)

The S&S Cycle 330-0438 Easy Start Camshaft is designed to simplify engine startup 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 optimal performance. This high-lift camshaft is ideal for modified engines with 106 cubic inches or greater displacement and compression ratios between 10.0:1 and 11.0:1. It delivers maximum power within the 3,000 to 6,000 RPM range, making it suitable for performance-oriented riding.
Included components consist of the camshaft, 4-gear set, gear cover gasket, bearings, retaining ring, O-ring, thread lock, and detailed instructions. The camshaft is manufactured in the USA and is compatible with stock, un-ported heads, although S&S CNC ported heads are recommended for optimal results. The installation requires high-lift valve springs, adjustable pushrods, and thorough clearance checks to ensure proper fitment and performance. Due to the gear drive system, users might notice increased valve train noise compared to traditional chains or belts.
This camshaft is not a bolt-in replacement and is not suitable for models equipped with OEM compression releases. Its design is optimized for modified engines seeking enhanced power and reliability, making it a popular choice among performance enthusiasts. Proper installation and component checks are essential to achieve the best results and maintain engine integrity over time.

Features:

• Allows easy engine start by reducing initial crank compression

• Centrifugal retraction of compression release lobes at higher RPMs

• High-lift camshaft designed for engines with 106+ cubic inches

• Optimized for compression ratios between 10.0:1 and 11.0:1

• Best performance in the 3,000 to 6,000 RPM range

• Includes comprehensive installation kit: camshaft, gears, gasket, bearings, and instructions

• Made in the USA with quality craftsmanship

• Compatible with stock and un-ported heads; CNC ported heads recommended

• Requires high-lift valve springs, adjustable pushrods, and clearance checks

• May produce increased valve train noise due to gear drive system