Model Segment:
Cruiser motorcycle, specifically a Softail model known for its classic styling and V-twin engine.
Target Audience:
Owners and independent repair shops seeking detailed technical information for maintenance and repair.
Manual Advantage:
Provides factory-level detail which is often more comprehensive than aftermarket manuals.
Content Depth:
Unrivaled depth in mechanical, electrical, and diagnostic procedures for the FLSTFI Fat Boy.
Availability:
Instant digital download eliminates shipping delays and costs, offering immediate access.
Engine Mechanical:
Complete overhaul, including disassembly, inspection, and reassembly of Twin Cam 88B engine components.
Fuel System:
Fuel injection system (EFI), fuel pump, injectors, fuel lines, throttle body, and diagnostic procedures.
Ignition System:
Ignition module, spark plugs, coils, and timing adjustments.
Exhaust System:
Mufflers, pipes, heat shields, and mounting hardware.
Transmission:
Five-speed Cruise Drive transmission service, including clutch, primary drive, and gearcase.
Drivetrain:
Drive belt, pulleys, and final drive maintenance and inspection.
Brakes:
Hydraulic brake system, including calipers, master cylinders, brake lines, pads, and rotor specifications.
Suspension:
Front fork (Telescopic) and rear shock absorber service, including fluid changes and component replacement.
Wheels And Tires:
Wheel bearings, tire pressure, mounting, and balancing.
Electrical System:
Wiring diagrams, battery, charging system (alternator, regulator), lighting, starter, and accessory circuits.
Bodywork And Frame:
Fender removal/installation, fuel tank service, seat, and frame inspection.
Controls:
Handlebar controls, throttle cables, clutch cable, and brake levers.
Diagnostics:
Troubleshooting charts, diagnostic trouble codes (DTCs) for EFI systems.
Preventive Maintenance:
Scheduled maintenance items including oil changes, filter replacements, and lubrication.
Engine Overhaul:
Detailed step-by-step instructions for complete engine teardown and rebuild.
Transmission Repair:
Procedures for clutch adjustment, primary chain tensioner replacement, and internal transmission component repair.
Brake Service:
Brake bleeding, pad replacement, caliper servicing, and master cylinder rebuild.
Suspension Service:
Fork seal replacement, fork oil changes, and rear shock absorber adjustments.
Electrical Troubleshooting:
Using wiring diagrams to diagnose and repair electrical faults.
Fuel System Diagnostics:
Testing fuel pressure, injector pulse width, and troubleshooting EFI errors.
Wheel Bearing Replacement:
Proper procedures for front and rear wheel bearing service.
Drive Belt Adjustment:
Inspection and tensioning of the final drive belt.
Depth Level:
Comprehensive, covering all aspects from basic maintenance to complete engine and transmission rebuilds.
Diagnostic Capability:
Advanced diagnostic procedures for EFI systems, including troubleshooting common DTCs.
Special Tools:
Lists specific Harley-Davidson special tools required for various procedures.
Engine Family:
Harley-Davidson Twin Cam 88B
Engine Type:
Air-cooled, 45-degree V-twin
Displacement:
1450 cc (88 cubic inches)
Bore X Stroke:
3.75 in. x 4.00 in. (95.25 mm x 101.6 mm)
Horsepower Approx:
Approx. 65-70 HP (Varies by specific tuning and exhaust)
Torque Approx:
Approx. 85-90 ft-lbs @ 3000 RPM (Varies)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI) with Delphi Electronic Control Module (ECM)
Fuel Type:
Unleaded gasoline, minimum 87 octane
Oil Type:
Harley-Davidson Syn3 or equivalent V-twin motorcycle specific synthetic oil
Oil Capacity:
4.0 US quarts (3.8 L) with filter change
Initial Service:
1,000 miles (1,600 km) or 6 months.
Subsequent Service:
Every 5,000 miles (8,000 km) or 12 months thereafter.
Brake Fluid Flush:
Refer to manual for specific interval, typically every 2 years.
Engine Oil Spec:
Refer to manual for specific H-D oil part numbers or API/SAE ratings.
Primary Chain Case Oil Spec:
Harley-Davidson Formula+ or equivalent.
Transmission Oil Spec:
Harley-Davidson Formula+ or equivalent.
Fork Oil Spec:
Refer to manual for specific weight and type (e.g., Harley-Davidson Type HD 10W).
Common Flaws:
Potential for oil leaks at rocker boxes or transmission seals, clutch plate wear, and timing issues if not maintained.
Fuel System Quirks:
Early EFI systems can sometimes exhibit occasional rough idling or starting issues if sensors or fuel delivery degrade.
Electrical Considerations:
Check battery connections and charging system output regularly; some connector issues can arise with age.
Brand Foundation:
Founded in 1903 in Milwaukee, Wisconsin, Harley-Davidson is an iconic American motorcycle manufacturer.
Fat Boy Introduction:
The Fat Boy model, known for its distinctive styling, was first introduced in 1990 and has been a popular model in the Softail line.
Twin Cam Era:
The 2006 model year features the Twin Cam 88B engine, a significant evolution from earlier Evolution engines, offering increased displacement and torque.
Manufacturing Location:
Harley-Davidson motorcycles, including the Fat Boy, are primarily manufactured in the United States.