Segment:
Cruiser Motorcycle
Target Audience:
Harley-Davidson owners seeking to perform maintenance and repairs themselves, or professional mechanics
Positioning Statement:
The FLSTF Fat Boy ST for 2005 continued its legacy as a quintessential American cruiser, known for its distinctive styling and the iconic Twin Cam engine.
Bike Features:
Full fenders, fat front tire, chrome accents, FL frame configuration, comfortable rider ergonomics
Engine:
Twin Cam 88B V-Twin, including disassembly, assembly, inspection, and tuning
Fuel System:
Carburetor (Keihin CV), fuel tank, fuel lines, fuel pump, and fuel gauge operation
Ignition System:
Ignition module, spark plugs, ignition coils, and troubleshooting
Transmission:
5-speed Cruise Drive transmission, including clutch, primary drive, gears, bearings, and seals
Drivetrain:
Belt drive, rear sprocket, front pulley, and belt tension adjustment
Suspension:
Front fork (telescopic), rear shock absorbers, springs, and damping adjustments
Brakes:
Front and rear hydraulic disc brakes, calipers, master cylinders, brake lines, and bleeding procedures
Electrical System:
Wiring diagrams, battery, charging system (stator, regulator/rectifier), starter motor, lighting, switches, and instrumentation
Wheels And Tires:
Wheel bearing inspection, tire pressure, and wheel removal/installation
Chassis And Frame:
Frame inspection, steering head bearings, and fork assembly
Bodywork And Trim:
Fenders, fuel tank, seat, handlebars, controls, and accessory installation
Maintenance:
Regular scheduled maintenance, oil changes, filter replacements, spark plug changes, and lubrication
Troubleshooting:
Diagnostic procedures for common problems, fault code interpretation (where applicable)
Repair:
Step-by-step repair instructions for all major components and systems
Disassembly And Assembly:
Detailed instructions for component removal and reinstallation
Rebuilding:
Comprehensive guides for rebuilding engine, transmission, and other major sub-assemblies
Depth Of Coverage:
Intermediate to Advanced, covering routine maintenance to complete engine and transmission overhauls
Diagnostic Capabilities:
Includes troubleshooting charts and symptom-based diagnostic guides
Specification Detail:
Provides torque specifications, clearances, tolerances, and fluid capacities
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)
Valve Train:
Overhead valves (OHV), 2 valves per cylinder
Power Output:
Approximately 68 HP @ 5200 RPM (estimated, as Harley-Davidson did not officially publish HP figures)
Torque Output:
Approximately 86 ft-lbs @ 3500 RPM (estimated)
Carburetor:
Keihin CV (Constant Velocity) 40mm
Fuel Type:
Unleaded gasoline, 91 octane (96 RON) or higher recommended
Fuel Capacity:
4.0 US gallons (15.1 L)
Safety Certification:
Meets FMVSS regulations for motorcycles in the US
Braking System:
Dual-action, front and rear hydraulic disc brakes
Lighting:
Halogen headlamp, taillight, stoplight, front and rear turn signals, auxiliary running lights
Frame Construction:
Steel, under-seat tube, cradle frame
Tire Construction:
Bias-ply, tubeless
Oil Change Interval:
Every 5,000 miles or 12 months, whichever comes first.
Primary Fluid Change Interval:
Every 10,000 miles or 24 months.
Transmission Fluid Change Interval:
Every 10,000 miles or 24 months.
Spark Plug Replacement:
Every 10,000 miles or 12 months.
Air Filter Cleaning:
Inspect every 5,000 miles, clean as needed.
Engine Oil Type:
Harley-Davidson SYN3 Full Synthetic Motorcycle Oil (or equivalent SAE 20W50)
Engine Oil Capacity:
3.5 US quarts (3.3 L) with filter change
Primary Chain Case Fluid:
Harley-Davidson Formula+ Transmission and Primary Chain Case Lubricant
Primary Chain Case Capacity:
2.5 US quarts (2.4 L)
Transmission Fluid Type:
Harley-Davidson Formula+ Transmission and Primary Chain Case Lubricant
Transmission Fluid Capacity:
23.7 US fluid ounces (0.7 L)
Brake Fluid Type:
DOT 5 Silicone-based (Harley-Davidson recommends their own or equivalent)
Common Flstf Issues:
Potential for cam bearing wear (early Twin Cams), stator/regulator failures, carburetor tuning sensitivity, belt tensioner wear.
Brand Philosophy:
Iconic American motorcycle manufacturer known for V-twin engines and custom lifestyle.
Fat Boy Introduction:
Original Fat Boy introduced in 1990.
Twin Cam Introduction:
Twin Cam engine family introduced in 1999.
Flstf Specific Evolution:
The 2005 FLSTF represents the second generation of the Fat Boy, featuring the Twin Cam 88B engine and a revised frame compared to the Evolution-powered models.
Manufacturing Location:
USA
