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2005–2006 · Cruiser · Buyer's Guide
All Cast Wheels, All Icon
The Fat Boy is the most literal reading of Harley's long-and-low Softail idea, built around a 1449 cc air-cooled 45° V-twin that makes 66 hp and a fat 86 lb-ft of torque through a 5-speed box and a belt final drive. What sets this generation apart is how it wears that hardware. Solid cast aluminum disc wheels, a wide front fork, floorboards, and a slammed stance give it a silhouette you read in a single glance. The rear suspension hides itself under the frame so the profile stays visually hardtail. Nothing about it apologizes for being heavy metal.
On the road it wants a big, unhurried rhythm. The torque arrives low and pulls you along without any need to work the gearbox, and at highway speed the long 64.5 in wheelbase holds a planted, confident line. The low 27.1 in seat makes the 714 lb wet weight feel friendlier at a stop than the number suggests, though you still feel every pound when you paddle it around a parking lot. It fits a rider who wants presence and character over agility. The honest caveat: these early Twin Cam engines need an owner who watches maintenance closely, especially the cam chain tensioners.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 66 hp (49 kW) |
|---|---|
| Torque | 86 lb-ft (117 Nm) |
| Displacement | 1449 cc |
| Engine | 45° V-twin |
| Cooling | Air-cooled |
| Gearbox | 5-speed |
| Final drive | Belt |
| Fork | Telescopic |
| Front brake | 292 mm |
| Front tire | MT90B16 |
| Rear tire | 150/80-16 |
| Wheelbase | 64.5 in (1638 mm) |
| Seat height | 27.1 in (688 mm) |
| Wet weight | 714 lb (324 kg) |
| Fuel capacity | 5.0 gal (18.9 L) |
| Fuel economy | 43 mpg (US) |
Equipment check
Chassis
Thumb the starter and the V-twin settles into a low, loping idle, calmer than the old solid-mounted Softails thanks to the counterbalanced 88B, but never sanitized out of it. Roll on and it stays a steady pulse you feel through the floorboards and the seat, present enough to keep the bike feeling alive without hammering your hands numb on a longer run. The riding position is open and relaxed, boots forward, back upright, wrists light. The belt drive takes up cleanly and the whole machine moves as one heavy, deliberate unit. Cruising the 5.0 gal tank at around 43 mpg, you fall into a pace where you stop rushing and start looking around. It feels big under you, wide across the tank, and every control asks for a calm, unhurried input rather than a quick one.
Cam Chain Tensioner Shoe Failure
The plastic shoes on the cam chain tensioners can become brittle over time and disintegrate, sending debris throughout the engine. This is a well-documented issue across Twin Cam 88 and early 96 engines.
Valve Stem Seal Leakage
Early models may experience oil consumption and blue smoke from worn valve stem seals, particularly on the 2005 Twin Cam 88.
Starter Clutch Wear
Some owners report starter clutch wear, leading to grinding noises or intermittent starting issues, especially on high-mileage examples.
Where this Harley-Davidson Softail Fat Boy FLSTF pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Wet weight
Seat height
Forget spec-sheet bragging. Here's who the Softail Fat Boy FLSTF is actually built for.
If Sturgis and Daytona are on your calendar and you want a bike that looks and sounds the part, this is squarely your machine. It delivers the sound, stance, and presence you came for.
Made for A1A — Florida Atlantic Coast · Black Hills / Sturgis Rally Hub · Daytona Main Street / Bike Week
For unhurried runs through small towns and old routes, the Fat Boy sets an easy, torquey rhythm that suits the pace you already ride at. Style and character are its whole point.
Made for Acadia National Park · Austin / Handbuilt Motorcycle Show · Blue Ridge Parkway
It will cover big miles in a straight, stable line and looks the part at every overlook. Just go in knowing it carries no touring gear from the factory and rewards attentive upkeep.
Made for Beartooth Highway · Blue Ridge Parkway · Going-to-the-Sun Road
If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
Any price note compares both bikes at the same age — the youngest age both have on the used market — against this Harley-Davidson Softail Fat Boy FLSTF. “cheaper/pricier” is what that bike costs second-hand, not how worn it is.
