Segment:
Cruiser Motorcycle
Target Audience:
Harley-Davidson FLSTF Fat Boy owners, mechanics, and enthusiasts.
Notes:
Essential resource for maintaining the iconic Fat Boy, covering all aspects of its mechanical and electrical systems.
Highlights:
Detailed diagrams, step-by-step instructions, diagnostic aids, torque specifications.
Engine:
Engine assembly, disassembly, tuning, diagnostics, specific components (pistons, cylinders, heads, valves, timing).
Fuel System:
Carburetor (CV), fuel lines, fuel pump, fuel filter, tank maintenance.
Transmission:
5-speed transmission assembly, disassembly, maintenance, lubrication, internal components.
Drivetrain:
Belt drive system, primary drive, clutch service, final drive maintenance.
Electrical System:
Ignition system, charging system (stator, regulator/rectifier), starting system (starter motor, solenoid), lighting, instrumentation, wiring diagrams, ECM/ECU troubleshooting.
Brakes:
Front and rear brake system maintenance, caliper service, master cylinder, hydraulic lines, bleeding procedures, rotor inspection.
Suspension:
Front fork service (oil change, seal replacement), rear shock absorber maintenance and adjustment.
Chassis And Frame:
Frame inspection, steering head bearing service, swingarm maintenance.
Bodywork And Trim:
Fender removal/installation, fuel tank removal/installation, seat service, exhaust system maintenance.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, lubrication, brake fluid flush, spark plug replacement, battery maintenance.
Troubleshooting:
Diagnostic charts for common problems, symptom-based troubleshooting guides.
Repair:
Detailed step-by-step instructions for component repair and replacement.
Overhaul:
Complete engine, transmission, and fork overhauls.
Assembly Disassembly:
Comprehensive guides for dismantling and reassembling all major motorcycle systems.
Technical Specifications:
Torque values, clearances, fluid capacities, electrical specifications.
Depth:
Comprehensive from basic adjustments to complete engine rebuilds.
Engine Type:
Air-Cooled, Twin Cam 88B 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. 67 hp @ 5000 rpm (Est.)
Torque:
Approx. 86 ft-lbs @ 3200 rpm (Est.)
Fuel Delivery:
Carburetor (Keihin CV with electronic sequential port fuel injection option on some models, but 2005 FLSTF typically CV).
Fuel Type:
Unleaded gasoline, minimum 91 octane (R+M)/2
Oil Type:
Harley-Davidson SYN3 Full Synthetic Motorcycle Oil or equivalent SAE 20W-50
Oil Capacity:
3.0 US qt (2.8 L) (with filter change)
Ignition System:
Electronic Ignition
Cooling Method:
Air-cooled
Transmission Type:
5-Speed, Constant Mesh
Primary Drive:
Multi-plate wet clutch, chain drive
Final Drive:
Belt Drive (70-tooth rear pulley, 32-tooth front pulley)
Gear Ratios:
1st: 9.315, 2nd: 6.520, 3rd: 4.792, 4th: 3.750, 5th: 3.150 (Approximate)
Transmission Fluid Type:
Harley-Davidson Formula+ Transmission and Primary Chaincase Lubricant or equivalent SAE 50
Transmission Fluid Capacity:
22 US fl oz (0.65 L)
Audio System:
Not standard on FLSTF models; typically an aftermarket addition.
Features:
ABS not typically standard on this model; cruise control not standard.
Features:
No integrated smartphone connectivity or Bluetooth standard.
Dashboard Features:
Analog speedometer, tachometer, fuel gauge, odometer, trip meter, indicator lights.
First Service:
1,000 miles (1,600 km) or 12 months
Subsequent Service:
Every 5,000 miles (8,000 km) or 12 months thereafter
Engine Oil Change:
Every 5,000 miles (8,000 km) or 12 months
Transmission Oil Change:
Every 10,000 miles (16,000 km) or 24 months
Primary Chaincase Oil Change:
Every 10,000 miles (16,000 km) or 24 months
Brake Fluid Flush:
Every 24 months
Engine Oil Viscosity:
SAE 20W-50
Transmission Fluid Viscosity:
SAE 50
Primary Chaincase Fluid Viscosity:
SAE 50
Fork Oil Type:
Harley-Davidson Type E (5W) or Type B (10W) (Refer to manual for specific application)
Common Wear Items:
Clutch wear, belt tension and wear, fork seals, exhaust gaskets, battery life.
Electrical Gremlins:
Wiring harness issues, regulator/rectifier failures, starter solenoid issues (common on older models).
Engine Tuning:
Carburetor adjustments (CV) may be needed for optimal performance, especially after modifications.
Brand Name:
Harley-Davidson Motor Company
Heritage Notes:
Iconic American motorcycle manufacturer with a rich history dating back to 1903.
Model Line:
Softail family
Fat Boy Introduction:
Originally introduced in 1990, the Fat Boy is known for its distinctive styling, inspired by the fat-tired look of post-WWII bikes.
2005 Model Significance:
Continues the Twin Cam 88B engine platform, featuring classic Fat Boy styling with modern engineering.
Manufacturing Location:
United States
