Harley-Davidson FLSTF Fat Boy Specs

2010 - 2012 • 3 variants

The Harley-Davidson FLSTF Fat Boy is a cruiser produced from 2010 to 2012 across 3 variants. Peak power output is 67 hp. Peak torque is 124.7 Nm.

About the Harley-Davidson FLSTF Fat Boy

Documented here are the full technical specifications for the Harley-Davidson FLSTF Fat Boy, a Custom / cruiser motorcycle with a production run from 1990 to 2012. Specification data includes engine type and displacement, maximum power and torque output, transmission details, frame construction, suspension travel front and rear, brake types and rotor dimensions, tyre sizes, and overall weight and dimension figures. Select a year above to view the complete spec sheet for that model year.

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Harley-Davidson FLSTF Fat Boy by Year

Harley-Davidson FLSTF Fat Boy 2012 specs

2012 Harley-Davidson FLSTF Fat Boy View specs →

Harley-Davidson FLSTF Fat Boy 2011 specs

2011 Harley-Davidson FLSTF Fat Boy View specs →

Harley-Davidson FLSTF Fat Boy 2010 specs

2010 Harley-Davidson FLSTF Fat Boy View specs →

Spec Evolution

How key specs changed across production years.

Specification	1995	1998	2007	2008	2009	2010	2011	2012
Displacement	1337 cc / 81.5 cu-in	1337 cc / 81.5 cu-in	1584 cc / 96 cu-in ↑	1584 cc / 96 cu-in	1584 cc / 96 cu-in	1584 cc / 96 cu-in	1584 cc / 96 cu-in	1690 cc / 103.1 cub in. ↑
Seat Height	-	-	Laden 635 mm / 25.0 in Unladen 690 mm / 27.1 in	Laden 635 mm / 25.0 in Unladen 690 mm / 27.1 in	Laden 635 mm / 25.0 in Unladen 690 mm / 27.1 in	Laden 635 mm / 25.0 in Unladen 690 mm / 27.1 in	Laden 635 mm / 25.0 in Unladen 690 mm / 27.1 in	Laden 635 mm / 25.0 in Unladen 690 mm / 27.1 in
Engine Detail	Four stroke, 45° V-Twin, OHV, 2 valves per cylinder.	Four stroke, 45° V-Twin, OHV, 2 valves per cylinder.	Four stroke, Twin Cam 96BTM Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder ↑	Four stroke, Twin Cam 96BTM Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder	Four stroke, Twin Cam 96BTM Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder	Four stroke, Twin Cam 96BTM Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder	Four stroke, Twin Cam 96BTM Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder	Four stroke, V-Twin, Twin Cam 103B Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, two valves per cylinder, with Integrated Oil-Cooler ↑
Wheelbase	-	-	1715 mm / 67.5 in	1715 mm / 67.5 in	1715 mm / 67.5 in	1715 mm / 67.5 in	1715 mm / 67.5 in	1635 mm / 64.2 in ↓
Brakes - Front	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292 mm disc, 4 piston caliper
Brakes - Rear	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292mm disc 4 piston caliper	Single 292 mm disc, 2 piston caliper
Fuel Capacity	19 Litres / 5.0 US gal	19 Litres / 5.0 US gal	18.9 Litres / 5.0 gal ↓	18.9 Litres / 5.0 gal	18.9 Litres / 5.0 gal	18.9 Litres / 5.0 gal	18.9 Litres / 5.0 gal	18.9 Litres / 5.0 US gal
Suspension - Front	39mm Telescopic forks	39mm Telescopic forks	41.3 mm telescopic, chrome dust covers ↑	41.3 mm telescopic, chrome dust covers	41.3 mm telescopic, chrome dust covers	41.3 mm telescopic, chrome dust covers	41.3 mm telescopic, chrome dust covers	41.3 mm telescopic, chrome dust covers
Suspension - Rear	Dual remote shocks adjustable preload,	Dual remote shocks adjustable preload,	Hidden, horizontal-mounted, coil-over shock	Hidden, horizontal-mounted, coil-over shock	Hidden, horizontal-mounted, coil-over shock	Hidden, horizontal-mounted, coil-over shock	Hidden, horizontal-mounted, coil-over shock	Hidden, horizontal-mounted, coil-over shock
Clutch	Dry, multiple discs, cable operated	Dry, multiple discs, cable operated	Multi-plate, wet	Multi-plate, wet	Multi-plate, wet	Multi-plate, wet	Multi-plate, wet	-
Bore x Stroke	88.8 x 108 mm	88.8 x 108 mm	95.25 x 111.25 mm ↑	95.25 x 111.25 mm	95.25 x 111.25 mm	95.25 x 111.25 mm	95.25 x 111.25 mm	98.4 x 111.1 mm ↑
Length	-	-	2445 mm / 96.2 in	2445 mm / 96.2 in	2445 mm / 96.2 in	2445 mm / 96.2 in	2445 mm / 96.2 in	2396 mm / 94.3 in ↓
Wet Weight	320 kg / 706 lbs	320 kg / 706 lbs	329.0 kg / 725 lbs ↑	329.0 kg / 725 lbs	329.0 kg / 725 lbs	329.0 kg / 725 lbs	329.0 kg / 725 lbs	329 kg / 725 lbs
Compression Ratio	8.5:1	8.5:1	9.2:1 ↑	9.2:1	9.2:1	9.2:1	9.2:1	9.6:1 ↑
Gear Ratios	-	-	1st 9.311 / 2nd 6.454 / 3rd 4.793 / 4th 3.882 / 5th 3.307 / 6th 2.790	1st 9.311 / 2nd 6.454 / 3rd 4.793 / 4th 3.882 / 5th 3.307 / 6th 2.790	1st 9.311 / 2nd 6.454 / 3rd 4.793 / 4th 3.882 / 5th 3.307 / 6th 2.790	1st 9.311 / 2nd 6.454 / 3rd 4.793 / 4th 3.882 / 5th 3.307 / 6th 2.790	1st 9.311 / 2nd 6.454 / 3rd 4.793 / 4th 3.882 / 5th 3.307 / 6th 2.790	1st 9.311 / 2nd 6.454 / 3rd 4.793 / 4th 3.882 / 5th 3.307 / 6th 2.79
Tyres - Front	130/90-16	130/90-16	140/75R17 ↑	140/75R17	140/75R17	140/75R17	140/75R17	140/75R17 67V
Tyres - Rear	130/90-16	130/90-16	200/55R17 ↑	200/55R17	200/55R17	200/55R17	200/55R17	200/55R17 78V
Rake	-	-	31.6°	31.6°	31.6°	31.6°	31.6°	31° ↓
Transmission / Drive	5 Speed	5 Speed	6 Speed ↑	6 Speed	6 Speed	6 Speed	6 Speed	6 Speed
Fuel Induction	38mm Keihin carburetor	38mm Keihin carburetor	Electronic Sequential Port Fuel Injection (ESPFI)	Electronic Sequential Port Fuel Injection (ESPFI)	Electronic Sequential Port Fuel Injection (ESPFI)	Electronic Sequential Port Fuel Injection (ESPFI)	Electronic Sequential Port Fuel Injection (ESPFI)	Electronic Sequential Port Fuel Injection (ESPFI)
Trail	-	-	147 mm / 5.7 in	147 mm / 5.7 in	147 mm / 5.7 in	147 mm / 5.7 in	147 mm / 5.7 in	147 mm / 5.8 in
Ignition	Analogue CDI	Analogue CDI	Single-fire, non-wasted, map-controlled spark ignition	Single-fire, non-wasted, map-controlled spark ignition	Single-fire, non-wasted, map-controlled spark ignition	Single-fire, non-wasted, map-controlled spark ignition	Single-fire, non-wasted, map-controlled spark ignition	Single-fire, non-wasted, map-controlled spark ignition
Max Torque	97 Nm / 71.5 lb-ft @ 2350 rpm	97 Nm / 71.5 lb-ft @ 2350 rpm	124.7 Nm / 92 ft. lbs @ 3000 rpm ↑	124.7 Nm / 92 ft. lbs @ 3000 rpm	124.7 Nm / 92 ft. lbs @ 3000 rpm	124.7 Nm / 92 ft. lbs @ 3000 rpm	124.7 Nm / 92 ft. lbs @ 3000 rpm	134 Nm / 13.7 kgf-m / 98.8 ft. lbs @ 3500 rpm ↑

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