Harley-Davidson Softail Fat Boy FLSTF (MY2012) — Cruiser
NastyNils / Harley-Davidson Press

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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Key specifications
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
A long, straight paved road stretches toward the horizon through agricultural fields in Vermont. Power lines and a mailbox are visible along the roadside. Lush green vegetation, cumulus clouds, good daylight conditions. The landscape is flat to gently rolling. Asphalt pavement appears to be in good condition. Rural American setting.
Meric Tuna / Pexels

Known issues

  • Front brake master cylinder corrosion recall

    brakes rare 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.

  • Inner cam bearings and lifters may be weak point

    engine occasional

    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

What's new versus the previous generation

If you're cross-shopping the older generation, here's what changed.

Harley-Davidson Softail Fat Boy FLSTF (FLSTF-MY2010)

Previous generation · 2010–2011

Harley-Davidson Softail Fat Boy FLSTF (FLSTF-MY2010)

Disc Wheels, Genuine American Thunder

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