Target Audience:
        
        
            Harley-Davidson owners, independent repair shops, technicians
        
     
    
    
        
            Competitors:
        
        
            Indian Chief, Victory Kingpin, Honda Shadow, Yamaha V-Star
        
     
    
    
        
            Vehicle Description:
        
        
            Iconic styling, comfortable riding position, powerful V-twin engine, known for its robust build and distinctive appearance
        
     
    
        
            Manual Value Proposition:
        
        
            Empowers owners and technicians with the knowledge to perform maintenance, diagnostics, and repairs, ensuring longevity and optimal performance of the FLSTF Fat Boy
        
     
 
    
    
    
        
            Engine:
        
        
            Twin Cam 88B V-Twin (1450cc), ignition, fuel injection, cooling, lubrication, exhaust
        
     
    
        
            Transmission:
        
        
            5-speed Cruise Drive, clutch, primary drive, final drive
        
     
    
        
            Electrical System:
        
        
            Battery, charging system, ignition system, lighting, instrumentation, starting system, security system
        
     
    
        
            Chassis:
        
        
            Frame, front suspension (telescopic fork), rear suspension (monoshock swingarm), wheels, tires
        
     
    
        
            Brakes:
        
        
            Front and rear hydraulic disc brakes, ABS (if equipped)
        
     
    
        
            Fuel System:
        
        
            Fuel tank, fuel pump, fuel injectors, throttle body, emissions controls
        
     
    
        
            Bodywork:
        
        
            Fenders, fuel tank, seat, handlebars, controls, covers
        
     
    
    
        
            Preventive Maintenance:
        
        
            Oil changes, filter replacements, lubrication points, chain/belt adjustment, brake inspection
        
     
    
        
            Engine Rebuild:
        
        
            Top-end overhaul, bottom-end overhaul, piston and ring replacement, valve service, timing procedures
        
     
    
        
            Transmission Overhaul:
        
        
            Gearbox disassembly and reassembly, clutch service, bearing replacement
        
     
    
        
            Electrical Diagnostics:
        
        
            Wiring diagrams, component testing, fault code interpretation, troubleshooting logic
        
     
    
        
            Suspension Service:
        
        
            Fork seal replacement, shock absorber service, linkage lubrication
        
     
    
        
            Brake System Repair:
        
        
            Brake pad replacement, caliper service, hydraulic system bleeding, rotor replacement
        
     
    
        
            Fuel System Cleaning:
        
        
            Injector cleaning, throttle body cleaning, fuel filter replacement
        
     
    
        
            Tire And Wheel Service:
        
        
            Tire mounting and balancing, wheel bearing replacement
        
     
    
    
        
            Depth:
        
        
            Comprehensive factory-level repair and diagnostic information
        
     
    
        
            Detail Level:
        
        
            Step-by-step instructions, torque specifications, special tool requirements, diagnostic charts
        
     
 
    
    
    
        
            Engine Type:
        
        
            Harley-Davidson Twin Cam 88B
        
     
    
        
            Displacement:
        
        
            1450cc (88 cubic inches)
        
     
    
        
            Configuration:
        
        
            Air-cooled, 45-degree V-twin
        
     
    
        
            Bore X Stroke:
        
        
            3.75 in x 4.00 in (95.25 mm x 101.6 mm)
        
     
    
    
        
            Valve Train:
        
        
            Overhead valves (OHV), 2 valves per cylinder
        
     
    
    
        
            Horsepower Est:
        
        
            Approx. 65-70 HP (at crank)
        
     
    
        
            Torque Est:
        
        
            Approx. 80-85 lb-ft (at crank)
        
     
    
    
        
            Fuel Delivery:
        
        
            Electronic Sequential Port Fuel Injection (ESPFI)
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline, minimum 91 octane recommended
        
     
    
    
        
            Engine Oil Capacity:
        
        
            4.0 US qt (3.8 L) with filter change
        
     
    
    
        
            Recommended Oil:
        
        
            Harley-Davidson SYN3 (20W-50) or equivalent motorcycle-specific V-twin oil
        
     
 
    
    
    
        
            Transmission Type:
        
        
            5-speed Manual
        
     
    
        
            Gear Ratios:
        
        
            1st: 9.31, 2nd: 6.45, 3rd: 4.77, 4th: 3.88, 5th: 3.15
        
     
    
    
    
    
        
            Transmission Oil Capacity:
        
        
            24 US oz (0.7 L)
        
     
    
        
            Transmission Oil Type:
        
        
            Harley-Davidson Formula+, Formula+ V-Twin Transmission Lubricant, or equivalent
        
     
 
    
    
    
        
            Crash Test Ratings:
        
        
            N/A (Motorcycle)
        
     
    
    
        
            Braking System:
        
        
            Dual-action, four-piston front caliper, two-piston rear caliper; hydraulic front and rear disc brakes. Optional ABS available on some models.
        
     
    
        
            Lighting:
        
        
            Halogen headlamp, stop/tail lights, amber front and rear turn signals
        
     
    
    
        
            Chassis Design:
        
        
            Sturdy steel frame provides stability and handling
        
     
    
        
            Security System:
        
        
            Factory-installed H-D Datalink immobilizer security system with siren (standard on most 2006 models)
        
     
 
    
    
    
        
            Audio System:
        
        
            Optional accessory audio systems were available from the dealer.
        
     
    
        
            Instrumentation:
        
        
            Analog speedometer, tachometer, fuel gauge, voltmeter, oil pressure indicator, and indicator lamps.
        
     
    
    
        
            ABS:
        
        
            Anti-lock Braking System (ABS) was an optional feature for the 2006 model year.
        
     
    
    
        
            Diagnostics:
        
        
            Utilizes a Delphi Electronic Control Module (ECM) for engine management, accessible via diagnostic tools (covered in manual).
        
     
 
    
    
    
        
            First Service:
        
        
            1000 miles (1600 km) or 6 months, whichever comes first
        
     
    
        
            Subsequent Service:
        
        
            Every 5000 miles (8000 km) or 12 months, whichever comes first
        
     
    
        
            Engine Oil Change Interval:
        
        
            Every 5000 miles (8000 km) or 12 months
        
     
    
        
            Primary Chain Tensioner Check:
        
        
            Every 2500 miles (4000 km) or 6 months
        
     
    
    
        
            Engine Oil:
        
        
            Harley-Davidson SYN3 (20W-50) or equivalent motorcycle-specific V-twin oil meeting Harley-Davidson specifications
        
     
    
        
            Transmission Oil:
        
        
            Harley-Davidson Formula+ or equivalent
        
     
    
        
            Primary Chain Case Oil:
        
        
            Harley-Davidson Formula+ or equivalent
        
     
    
    
        
            Fork Oil:
        
        
            Refer to manual for specific grade (typically 10W or 15W)
        
     
    
    
        
            Primary Chain Tensioner Wear:
        
        
            Hydraulic tensioner can wear out, leading to noise and potential chain damage. Regular inspection recommended.
        
     
    
        
            Cam Chain Tensioner Wear:
        
        
            Similar to primary tensioner, cam chain tensioners can wear on early Twin Cam engines, though the 88B has a different setup than the 88A. Manual covers inspection and replacement.
        
     
    
        
            Crankshaft Position Sensor Failure:
        
        
            Can cause intermittent starting issues or stalling.
        
     
    
        
            Idle Air Control Valve Issues:
        
        
            Can lead to rough idle or stalling.
        
     
 
    
    
    
        
            Heritage:
        
        
            Harley-Davidson Motor Company, established in 1903, is an iconic American motorcycle manufacturer with a rich history of innovation and cultural impact.
        
     
    
    
        
            Fat Boy Introduction:
        
        
            The Fat Boy model was first introduced in 1990 as part of the FXST line, characterized by its distinctive solid-cast aluminum disc wheels and fat tires.
        
     
    
        
            Flstf Development:
        
        
            The FLSTF is a variation of the Softail chassis, which debuted in 1984, featuring a hidden rear monoshock suspension system that mimics the appearance of a hardtail frame.
        
     
    
    
        
            Production Years Flstf:
        
        
            1990 - Present (with various engine and feature updates)
        
     
    
        
            Manufacturing Location:
        
        
            United States