Market Position:
The Harley-Davidson Fat Boy S (FLSTFBS) represents a premium, performance-oriented cruiser within Harley-Davidson's Softail lineup, often targeting riders who appreciate modern technology combined with classic styling and enhanced power. It was a limited production model known for its distinctive color schemes and blacked-out components.
Competitive Analysis:
Competed against other large-displacement V-twin cruisers from manufacturers like Indian Motorcycle (e.g., Springfield, Chief models) and Japanese brands offering similar displacement and styling cues. Its key differentiators were the Screamin' Eagle Twin Cam 110B engine, distinctive 'S' badging, and exclusive aesthetic packages.
Key Features:
Screamin' Eagle Twin Cam 110B engine, ABS braking system, cruise control, premium paint schemes (often satin or matte finishes), blacked-out components (handlebar, mirrors, forks, wheels, exhaust), solo seat, classic Fat Boy styling with modern enhancements.
Coverage Areas:
All mechanical and electrical systems, bodywork, chassis, and specialized components.
Page Count:
Estimated 500+ pages (typical for comprehensive Harley-Davidson service manuals)
Manual Type:
Factory Service Manual (FSM), Workshop Manual, Parts Catalog
Systems Covered:
Engine (Twin Cam 110B), Fuel System (EFI), Ignition System, Lubrication System, Exhaust System, Transmission, Clutch, Primary Drive, Drive Belt, Wheels, Tires, Brakes (Front & Rear ABS), Suspension (Front Forks, Rear Shocks), Frame, Sheet Metal, Electrical System (Wiring Diagrams, Lighting, Gauges, Battery), Controls, Instruments, Seat, Accessories.
Procedures Included:
Routine Maintenance, Scheduled Service, Troubleshooting, Diagnostic Procedures, Component Removal & Installation, Disassembly & Reassembly, Engine Rebuilds, Transmission Overhaul, Electrical System Repairs, Brake System Service, Suspension Adjustments, Wheel & Tire Mounting, Bodywork Repair, Fluid Changes, Filter Replacements, Tune-ups, Diagnostic Trouble Code (DTC) Interpretation.
Technical Depth:
Comprehensive, covering basic maintenance to complete engine and transmission rebuilds. Includes detailed schematics, torque specifications, diagnostic flowcharts, and part identification.
Engine Type:
Air-cooled, Twin Cam 110B
Displacement:
1783 cc (109.7 cu in)
Bore X Stroke:
4.000 in x 4.375 in (101.6 mm x 111.1 mm)
Torque:
118.0 ft-lb @ 3,500 rpm (160 Nm @ 3,500 rpm) (stock specification)
Horsepower:
Approx. 98 HP (stock specification, varies slightly by dyno and conditions)
Fuel Induction:
Electronic Sequential Port Fuel Injection (ESPFI)
Cooling System:
Air-cooled
Fuel Type:
Premium Unleaded Gasoline (91 octane or higher recommended)
Fuel Tank Capacity:
5.0 US gal (18.9 L)
Transmission Type:
6-speed Cruise Drive
Clutch:
Hydraulically actuated, wet, multi-plate
Final Drive:
Belt, 32/66 ratio
Gear Ratios:
1st: 9.312, 2nd: 6.454, 3rd: 4.793, 4th: 3.821, 5th: 3.174, 6th: 2.790
Safety Ratings:
Not applicable in the same way as automobiles. Focus on rider safety features.
Active Features:
Anti-lock Braking System (ABS) standard on front and rear brakes, integrated front and rear braking control.
Passive Features:
Strong steel frame construction, robust suspension components, reliable lighting systems (headlight, taillight, turn signals), neutral engine design for predictable power delivery.
Infotainment System:
Base audio system often included, typically with analog gauges and potentially a small LCD display for odometer, clock, gear indicator. Some models offered optional boom audio upgrades. No complex touchscreen or navigation typically found on this specific model, focusing on mechanical engagement.
Driver Assistance:
Cruise Control (standard on FLSTFBS), Anti-lock Braking System (ABS).
Connectivity:
Limited. Primarily focused on the vehicle's onboard diagnostics and control systems. No Bluetooth or smartphone integration typically offered as standard from the factory.
Service Intervals:
Initial service at 1,000 miles (1,600 km). Subsequent services typically every 5,000 miles (8,000 km) or annually, whichever comes first. Key items include oil changes, filter replacements, primary chain lubrication, brake inspections, clutch adjustment, tire checks, and spark plug replacements.
Engine Oil:
Harley-Davidson Syn3 (100% Synthetic) SAE 20W-50 or equivalent. Capacity: 4.0 US quarts (3.8 L) with filter change.
Primary Chain Case Oil:
Harley-Davidson Genuine Formula+ (Formula Plus) or Syn3 SAE 20W-50. Capacity: 2.8 US quarts (2.6 L) (check level via dipstick).
Transmission Oil:
Harley-Davidson Genuine Formula+ (Formula Plus) or Syn3 SAE 50. Capacity: 1.0 US quart (0.95 L).
Brake Fluid:
DOT 4 (for ABS and non-ABS models).
Coolant:
N/A (Air-cooled engine)
Oil Filter Part Number:
26030-99A (or equivalent).
Known Issues:
While generally reliable, common areas for inspection include clutch cable adjustment, potential for oil leaks around primary or transmission seals, and checking for proper function of ABS sensors. The Twin Cam 110B's oiling system should be monitored, particularly with high-performance use. Some owners report exhaust system heat management as a consideration.
Brand Heritage:
Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer renowned for its V-twin engines, distinctive styling, and strong brand loyalty. The company has a rich history in racing, military service, and cultural impact.
Model Evolution:
The Fat Boy, introduced in 1990, became an instant classic, known for its chrome, wide front tire, and solid-disc wheels. The 'S' designation typically indicates a more performance-oriented version, often featuring the larger displacement engine and premium styling. The FLSTFBS specifically utilized the Screamin' Eagle 110B engine, a significant upgrade over standard Softail models of the era.
Production Years:
The Fat Boy S FLSTFBS model was produced for a limited run, specifically for model years 2016 and 2017, following its introduction. This manual covers this specific production period.
Manufacturing Location:
USA (Various Harley-Davidson manufacturing facilities)
Recognitions:
The Fat Boy line has consistently received positive reviews for its styling and cruiser performance. The 'S' models, with their enhanced engines, were often highlighted for their power and exclusive appeal within the motorcycle press.
Ratings:
Customer satisfaction ratings for Harley-Davidson motorcycles are generally high. Specific performance and styling aspects of the Fat Boy S were praised by enthusiasts and reviewers.
Certifications:
Meets all relevant US EPA and California Air Resources Board (CARB) emissions standards for its model year.
