Market Segment:
Cruiser motorcycle market, specifically catering to the demand for retro-styled, V-twin motorcycles with modern performance.
Key Competitors:
Other Harley-Davidson Softail models, as well as models from brands like Indian Motorcycles and select Japanese cruiser manufacturers.
Model Appeal:
The Fat Boy Lo is known for its iconic Fat Boy styling with a lower profile, blacked-out components, and a classic yet modern aesthetic, appealing to riders who value heritage and style.
Manual Utility:
Essential for owners and technicians to maintain the reliability, performance, and safety of the Harley-Davidson FLSTFB Softail Fat Boy Lo.
Engine:
Detailed disassembly, assembly, inspection, and repair of the Twin Cam 103B engine (including cylinders, pistons, crankshaft, camshafts, valvetrain, lubrication system, cooling system, fuel system, and ignition system).
Transmission:
Inspection, maintenance, and repair of the 6-speed Cruise Drive transmission, including clutch, primary drive, gear shifting mechanisms, and final drive.
Chassis:
Comprehensive coverage of the Softail frame, suspension (front forks, rear shock absorbers), steering system, and swingarm.
Electrical:
Detailed diagnosis and repair of the electrical system, including battery, charging system, ignition system, lighting, instrumentation, starting system, and wiring diagrams.
Braking System:
Service procedures for hydraulic disc brakes (front and rear), including brake caliper, master cylinder, brake lines, and bleeding procedures.
Fuel System:
Diagnosis and repair of the fuel injection system (EFI), including fuel pump, fuel injectors, throttle body, and sensors.
Bodywork And Trim:
Procedures for removal, installation, and repair of fenders, fuel tank, seat, handlebars, exhaust system, and other body components.
Maintenance:
Routine maintenance, oil changes, filter replacements, lubrication points, and inspection schedules.
Troubleshooting:
Systematic diagnostic procedures for identifying and resolving common and uncommon problems.
Repair:
Detailed step-by-step instructions for component repair and replacement.
Disassembly And Assembly:
Comprehensive guides for taking apart and reassembling various vehicle systems and components.
Adjustments:
Precise instructions for adjustments to systems like clutch, throttle, brakes, and suspension.
Depth Level:
Comprehensive, bumper-to-bumper coverage suitable for both professional mechanics and experienced DIY enthusiasts.
Visuals:
Detailed illustrations, exploded diagrams, drawings, and photographs to guide procedures.
Special Tools:
References to specific Harley-Davidson service tool numbers and their usage.
Specifications:
Inclusion of service data, factory specifications, allowable limits, and tightening torques.
Engine Type:
Air-cooled, Twin Cam 103B V-Twin
Displacement:
1690 cc (103 cubic inches)
Bore X Stroke:
3.875 in. x 4.375 in. (98.4 mm x 111.1 mm)
Valve Train:
Pushrod-actuated, overhead valves with two valves per cylinder
Torque:
Approx. 98.3 ft-lb (133 Nm) at 3,250 RPM (Manufacturer's Claim - specific to model year)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI)
Fuel Type:
Premium unleaded gasoline, 91 octane or higher
First Service:
Typically at 1,000 miles (1,600 km) or 6 months, whichever comes first (refer to manual for exact details).
Subsequent Service:
Generally every 5,000 miles (8,000 km) or 12 months for routine checks and fluid changes. Engine internal services may have longer intervals.
Engine Oil:
Harley-Davidson Genuine V-Twin 20W-50 (or equivalent API CI-4 or JASO MA rated synthetic oil). Oil capacity: 4.0 US qt (3.8 L) with filter change.
Transmission Oil:
Harley-Davidson Formula + Transmission & Primary Chaincase Lubricant (or equivalent SAE 80W-90 gear oil API GL-5).
Primary Chaincase Oil:
Harley-Davidson Formula + Transmission & Primary Chaincase Lubricant (or equivalent SAE 80W-90 gear oil API GL-5).
Brake Fluid:
DOT 4, HD-DOT 4, or equivalent.
Common Wear Items:
Clutch plates, brake pads, tires, and suspension bushings are common wear items. Some early models of the Twin Cam engine may have had issues with cam chain tensioners.
Electrical Considerations:
While generally reliable, electrical connections and grounds should be regularly inspected for corrosion, especially in humid environments.
Brand Focus:
Harley-Davidson is an iconic American motorcycle manufacturer with a rich history dating back to 1903, renowned for its V-twin engines and cruiser lifestyle.
Fat Boy Origin:
The original Fat Boy was introduced in 1990, becoming an instant classic with its distinctive wide front fork, fluted tank, solid-disc wheels, and chrome accents. The 'Lo' designation signifies a lower overall seat height.
Manufacturing Location:
Typically manufactured in the United States (e.g., York, Pennsylvania, or Milwaukee, Wisconsin).
