2012 · Cruiser · Buyer's Guide
Softail Fat Boy FLSTF (MY2012)
The Original Fat Custom Icon
The Machine's Character
The Fat Boy set the template for the fat custom, and this generation wears it with total conviction. Under the tank sits the air-cooled 1690 cc Twin Cam 103B, a 45° V-twin rated at 78 hp and a meaty 99 lb-ft that peaks low at 3,000 rpm. The six-speed Cruise Drive gearbox keeps highway revs calm. Solid bullet-hole cast aluminum wheels, a fat 200-section rear, wide internally-wired bars, and hidden horizontal shocks faking a hardtail line give it presence you read from across a parking lot. Style and charisma are where this bike earns its keep.
On the road it delivers exactly what the stance promises: low, planted, and happiest holding a steady line at speed, where its high-speed stability really shows. The 25.0-inch seat and low center of gravity make 728 lb (330 kg) feel manageable at a standstill, though there's no hiding that weight when you thread through tight streets. Build quality is genuinely high, and the aftermarket for this platform is enormous, so it ages into whatever you want it to be. This is a bike for riders who buy the feeling first. If you want light, flickable, and urban-nimble, look elsewhere.
Hard Numbers
Spec sheets don't ride bikes, but they set the baseline.
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| Power | 78 hp (58 kW) |
|---|---|
| Torque | 99 lb-ft (134 Nm) @ 3,000 rpm |
| Displacement | 1690 cc |
| Engine | 45° V-twinMotorcycles With V-Twin Engines → |
| Cooling | Air-cooled |
| Gearbox | 6-speed |
| Front tire | 140/75 R17 |
| Rear tire | 200/55 R17 |
| Seat height | 25.0 in (635 mm) |
| Wet weight | 728 lb (330 kg) |
| Fuel capacity | 5.0 gal (18.9 L) |
Equipment check
Safety
- ABS Optional
Known issues
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Front brake master cylinder corrosion recall
The threads for the front brake master cylinder's brake-line banjo bolt can corrode, which may cause a sudden loss of brake fluid and a loss of the front brake. A recall (NHTSA 14V794000) was issued to flush and inspect the front brake master cylinder and replace it if necessary.
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Inner cam bearings and lifters may be weak point
The Twin Cam 103B engine uses caged-style inner cam bearings (INA B-168) and 'C' lifters, which are considered substandard compared to aftermarket alternatives. Upgrading to captive needle bearings and better lifters is common when servicing the cam chest.
The Numbers Compared
Compare the technical specifications of the Harley-Davidson Softail Fat Boy FLSTF with other bikes in its class.
Head-to-head: Harley-Davidson Softail Fat Boy FLSTF vs. its rivals
Power
Torque
Displacement
Wet weight
Seat height
What's new versus the previous generation
If you're cross-shopping the older generation, here's what changed.
Previous generation · 2010–2011
Harley-Davidson Softail Fat Boy FLSTF (FLSTF-MY2010)
Disc Wheels, Genuine American Thunder
Compare to the previous model →Alternatives to the Harley-Davidson Softail Fat Boy FLSTF
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