Welcome to the essential guide for your 2006 Softail FLHRSI Road King Custom. This iconic cruiser, a testament to an enduring legacy since 1903, combines classic styling with the robust performance of its air-cooled Twin Cam 96B engine. Renowned for its comfortable ride and distinctive cruiser aesthetic, the Road King series, built upon the innovative Softail chassis, offers a unique blend of heritage and modern engineering. This particular model, produced between 2004 and 2006, is celebrated for its reliable performance and the distinctive V-twin experience that is globally recognized for, making it a favored choice for touring and everyday riding. This comprehensive Factory Service Manual (FSM) / Workshop Service Repair Manual (WSRM) is designed to be your authoritative resource for all aspects of your 2006 Softail FLHRSI Road King Custom. Covering full service, repair, maintenance, and troubleshooting, this extensive manual provides detailed, step-by-step instructions, complete with high-resolution diagrams and exploded views. It thoroughly addresses engine service, transmission repair, drivetrain maintenance, chassis and suspension work, electrical systems, fuel systems, braking, and more. Whether you are a dedicated owner, an independent mechanic, or a DIY enthusiast, this manual will equip you with the factory-level knowledge needed to maintain, diagnose, and repair your motorcycle, ensuring its optimal performance and longevity.