Classic and Classy Motorcycles Ltd

Historical Context

First introduced in 1990, the Harley-Davidson Fat Boy quickly became a heavyweight icon. By the time the 2004 model year arrived, the Fat Boy FLSTF had long since secured its place as one of the most recognized motorcycles in the world. Built on the Softail platform, the Fat Boy brought together classic hardtail styling with hidden rear suspension and a strong, muscular aesthetic. Its design gained widespread fame in the 1990s, even featuring in pop culture—most notably ridden by Arnold Schwarzenegger in "Terminator 2." The 2004 model continued the tradition with the proven Twin Cam 88 engine and design refinements that kept it both modern and nostalgic.

Technical Specifications and Performance

• Year: 2004
• Make: Harley-Davidson
• Model: FLSTF Fat Boy
• Engine Displacement: 1450cc (88 cubic inches)
• Engine Type: Air-cooled Twin Cam 88B V-twin
• Compression Ratio: 8.9:1
• Horsepower: Around 65 hp
• Torque: Approximately 86 lb-ft
• Fuel System: Carbureted (fuel injection optional)
• Ignition System: Electronic
• Transmission Type: 5-speed manual
• Cooling System: Air-cooled
• Fuel Capacity: 5.0 gallons
• Braking System: Single disc front and rear
• Wheelbase: 63.5 inches
• Seat Height: 25.4 inches
• Dry Weight: Around 672 lbs
• Top Speed: Approx. 105 mph

Technical Advancements

The 2004 Fat Boy was powered by the Twin Cam 88B engine, which featured internal counterbalancers to reduce vibration—a major improvement over earlier Big Twin motors. It retained the classic air-cooled V-twin design while improving rider comfort on long hauls. The Softail frame allowed for a visually clean hardtail look, with hidden shocks offering modern ride comfort. Optional fuel injection added smoother throttle response, though many still opted for the carbureted version due to its mechanical simplicity and sound.

Evolution of the Model

The 2004 model marked a point where refinement met tradition. Compared to the early 1990s versions, the Fat Boy now had better suspension, improved braking, and more modern electrics. It preserved its distinctive solid disc wheels, wide forks, and fat tires. The Fat Boy remained a favorite among riders who wanted a muscular, cruiser-style Harley that was equally at home on the highway or posing at a local bike meet.

Competitors in the Market

During the early 2000s, the FLSTF Fat Boy competed against heavyweight cruisers like the Yamaha Road Star 1600, Honda VTX1800, and Kawasaki Vulcan 1500. While those bikes often offered more horsepower or advanced features, none matched Harley’s deep-rooted heritage or the visceral charm of the Fat Boy. Its unmistakable styling, deep V-twin rumble, and factory custom feel gave it a unique place in the market.

Legacy and Rider Appeal

The 2004 Fat Boy is now considered a modern classic. With the reliable and respected Twin Cam engine, timeless lines, and a commanding road presence, it continues to be a sought-after model for collectors and riders alike. Many owners keep them close to stock to preserve their identity, while others use them as a canvas for custom builds. Either way, the 2004 FLSTF remains a benchmark for what a factory cruiser should be—bold, brawny, and unmistakably Harley-Davidson.