Harley Davidson FLFBS Softail Fat Boy 114 2021 Service Manual

The 2021 Fat Boy 114 marked the return of one of Harley-Davidson's most recognizable cruisers, wrapped in what H-D called "Bright Chrome Styling" — a full-chrome treatment across the headlight nacelle, exhaust, air cleaner, and engine covers that replaced the previous model's satin finish. No mechanical changes came with the 2021 model, but the chrome update kept the Fat Boy looking sharp for the new year, with pricing starting at $19,999.

Power comes from the Milwaukee-Eight 114 V-twin, paired with a 6-speed gearbox and a claimed 119 ft-lb of torque at just 3,000 rpm. Bore and stroke sit at 102mm and 114.3mm for a total displacement of 1,868cc, running a mild 10.5:1 compression ratio that tolerates mid-grade fuel.

The Fat Boy's signature look still rides on solid aluminum 18-inch Lakester wheels, shod with a massive 160mm front and 240mm rear tire — the widest front tire ever offered from the factory on this model. A racing-style cartridge fork handles front suspension duties, while an adjustable mono-shock rear keeps the hardtail look intact. The bike carries a 5-gallon fuel tank and tips the scales at 671 lbs dry, 699 lbs ready to ride. Standard equipment includes ABS, keyless ignition, and a factory security system.

Whether you're maintaining a garage-kept example or wrenching on a well-ridden Fat Boy 114, this factory service manual covers the procedures, torque specs, and diagrams needed to do the job right.