Harley-Davidson Softail FLST and FXST 2006 Factory Service Manual (P/N 99482-06)

• Covers the complete 2006 FLST and FXST model series, detailing chassis service and mechanical procedures for variants including the FLSTC, FLSTF, FXSTB, and FXSTD.
• Official factory publications including P/N 99482-06, P/N 99498-06, and P/N 99494-06. Delivered as a searchable PDF spanning 1,195 pages of comprehensive engine, electrical, and fuel-injection data for the 2006 build year.
• Features 107 technical figures and 8 extensive torque specification tables.
• Contains dedicated maintenance charts for engine oil, primary chaincase fluid, transmission lubrication, and suspension component inspection.
• Incorporates the FLSTFSE2 model supplement and comprehensive electrical diagnostics data.
• Details Electronic Fuel Injection (EFI), Turn Signal Security Modules (TSSM), Twin Cam 88B engines, Springer forks, and constant velocity (CV) carburetors.
• Explores steering head bearings, idle air controls, manifold absolute pressure (MAP) sensors, vehicle speed sensors, secondary clutch actuators, primary chain tensioners, and ignition coils.

Routine Maintenance and Advanced Procedures

This factory service reference lays out exacting maintenance schedules for the entire 2006 Softail lineup. It breaks down required inspections and fluid changes across 5,000, 10,000, 15,000, 20,000, and 25,000-mile service intervals. Technicians will find dedicated chapters detailing the starter, drive belt, transmission, and electrical wiring. Bypassing expensive dealership visits, DIYers and mechanics can use the step-by-step instructions to perform complex tasks, such as truing laced wheels, adjusting steering head bearing fall-away on Springer models, bleeding the FLSTFSE2 specific hydraulic clutch, and executing TSSM password learning. The documentation delves into specific cleaning, disassembly, and assembly practices, while outlining critical hardware and thread-repair techniques for factory fasteners. Proper maintenance of high-pressure fuel systems and heavy-duty electrical components carries inherent risks; mechanics must always verify battery disconnection and relieve fuel line pressure before beginning any component teardown outlined in these pages. Further guidance includes battery care protocols, brake pad wear limits, and oil system routing.

System Diagnostics and Troubleshooting

Loading this manual directly on a workshop laptop provides a distinct advantage for daily workflow, completely eliminating the guesswork during complex electrical diagnosis right at the workbench. To support this, the manual includes detailed wiring diagrams, diagnostic flow charts, electrical circuit schematics, exploded assembly views, and drive belt wear analysis charts.

Mechanics overhauling the bottom end or the drive components of these specific models should be aware of notorious mechanical pitfalls. For example, pulling the retention pin from the primary cam chain tensioner after removing the cam support plate unleashes the full 35-40 pounds of spring pressure, which violently accelerates the mechanism and frequently cracks the tensioner shoe. Additionally, technicians must remain aware that the clutch hub mainshaft nut features left-hand threads, meaning any attempt to remove it with standard counterclockwise rotation will severely damage the shaft.

Specification Highlights

Accurate torque and fluid values are critical for proper reassembly. This documentation provides exact factory reference numbers for the chassis, engine mounts, and electrical subsystems. Front engine mount nuts require a tightening torque of 70–80 ft-lbs (94.9–108.5 Nm). When performing a complete fluid change, the oil tank capacity is firmly documented at 3.5 qt (3.3 L). Transmission drain plugs must be seated to 14–21 ft-lbs (19.0–28.5 Nm) to prevent casing damage or fluid leaks. Additionally, the maintenance quick-reference charts list the standard spark plug torque at 12–18 ft-lbs (16–24 Nm).