Segment:
Cruiser Motorcycle
Target Audience:
Harley-Davidson owners and independent repair shops.
Key Competitors Segment:
Other large-displacement V-twin cruisers from brands like Indian, Victory (historical).
Distinctive Styling:
Iconic Fat Boy styling with wide front fork, large headlight, and teardrop fuel tank.
Engine Platform:
Harley-Davidson's Twin Cam engine, a staple of their modern lineup.
Manual Purpose:
To provide comprehensive, authoritative information for the maintenance and repair of the 2007 FLSTF Fat Boy.
Engine System:
Detailed diagnosis, overhaul, and tuning of the Twin Cam 96 engine.
Fuel System:
Fuel injection (EFI), fuel pump, fuel lines, fuel tank, and filtration.
Ignition System:
Ignition module, spark plugs, coils, and troubleshooting.
Transmission System:
6-speed Cruise Drive transmission: disassembly, assembly, lubrication, and troubleshooting.
Drivetrain:
Primary drive, clutch, final drive belt system, and maintenance.
Chassis Suspension:
Front fork (Telescopic), rear shock absorbers, swingarm, and wheel bearings.
Braking System:
Front and rear hydraulic disc brakes, master cylinders, calipers, and fluid replacement.
Electrical System:
Battery, charging system (alternator/stator, regulator/rectifier), lighting, starting system, and wiring diagrams.
Instrumentation Controls:
Speedometer, tachometer, indicator lamps, switches, and throttle/clutch controls.
Bodywork Fittings:
Fenders, fuel tank, seat, handlebars, and related components.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment (if applicable to primary drive), lubrication points.
Troubleshooting:
Diagnostic procedures for common and uncommon faults across all systems.
Major Repairs:
Engine rebuilds, transmission overhauls, suspension component replacement.
Component Disassembly Assembly:
Step-by-step instructions for stripping down and reassembling major components.
Electrical Diagnostics:
Wiring diagrams, component testing, and fault finding for the electrical system.
Wheel Tire Service:
Wheel bearing replacement, tire mounting/balancing, and spoke adjustment (if applicable to rim type).
Suspension Adjustment:
Front fork oil level checks and replacement, rear shock adjustment.
Depth:
Detailed service procedures, torque specifications, and diagnostic flowcharts.
Diagnostic Tools:
Information on using diagnostic tools and reading fault codes, likely referencing Harley-Davidson specific diagnostic software (e.g., Digital Technician).
Engine Type:
Air-cooled, Twin Cam 96B V-twin
Displacement:
96 cu in (1584 cc)
Bore X Stroke:
3.75 in x 4.38 in (95.25 mm x 111.25 mm)
Valvetrain:
Overhead valves (OHV), 4 valves per cylinder (2 per head)
Fueling:
Electronic Sequential Port Fuel Injection (ESPFI)
Horsepower:
Approx. 65-70 HP (figures vary based on dyno and specific configuration)
Torque:
Approx. 90-95 ft-lbs @ 3,000-3,500 RPM
Fuel Type:
Unleaded gasoline, minimum 87 octane
Transmission Type:
6-speed Cruise Drive, constant mesh
Primary Drive:
Patented, pre-engaged, shoe-type, centrifugal clutch; chain drive to transmission
Final Drive:
Carbon-reinforced, belt drive
Gear Ratios:
1st: 9.312, 2nd: 6.650, 3rd: 4.947, 4th: 3.832, 5th: 3.156, 6th: 2.790
Transmission Fluid:
Harley-Davidson Formula Plus Lubricant (or equivalent) or Syn3 Transmission Fluid
Initial Service:
First service typically around 1,000 miles (1,600 km).
Regular Maintenance:
Oil and filter changes every 5,000 miles (8,000 km) or annually. Further intervals for transmission fluid, primary lubricant, brake fluid, and inspections.
Engine Oil:
Viscosity: 20W50. Specification: API SG, JASO FD or Harley-Davidson SYN3 or Formula+ (for primary/transmission).
Transmission Fluid:
Harley-Davidson Formula Plus Lubricant or Harley-Davidson SYN3.
Primary Chain Case Lubricant:
Harley-Davidson Formula Plus Lubricant or Harley-Davidson SYN3.
Common Wear Items:
Clutch friction plates, brake pads, wheel bearings, drive belt, fork seals.
Engine Considerations:
Potential for oil leaks, cam chain tensioner wear (in earlier Twin Cam models, though less prevalent in later ones like '07, still worth checking), and exhaust flange leaks.
Electrical Considerations:
Stator failures, regulator/rectifier issues, and battery terminal corrosion are known concerns across various Harley models.
Brand Origins:
Harley-Davidson Motor Company, founded in 1903, an icon of American motorcycling.
Fat Boy Introduction:
The Fat Boy name and distinctive styling debuted in 1990. The FLSTF designation is key to this model line.
Twin Cam Introduction:
The Twin Cam engine platform was introduced in 1999, becoming the primary engine for Harley-Davidson Big Twins.
Manufacturing Location:
United States (primarily York, Pennsylvania and Milwaukee, Wisconsin plants).
