2012 Harley-Davidson FLSTF Fat Boy Specifications

Name: 2012 Harley-Davidson FLSTF Fat Boy
Brand: Harley-Davidson

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2012 Harley-Davidson FLSTF Fat Boy Overview

The 2012 Harley-Davidson FLSTF Fat Boy is a custom / cruiser motorcycle built around 1690 cc of displacement. Under the tank sits a Four stroke, V-Twin, Twin Cam 103B Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, two valves per cylinder, with Integrated Oil-Cooler engine, a compression ratio of 9.6:1. 2012 Harley-Davidson FLSTF Fat Boy delivers 134 Nm @ 3500 rpm of torque. From a practical standpoint, the 2012 FLSTF Fat Boy tips the scales at 329 kg, carries a 18.9-litre fuel tank, offers a seat height of Laden 635 mm and spans a 1635 mm wheelbase. Scroll down for the complete 2012 Harley-Davidson FLSTF Fat Boy spec sheet covering every technical detail from suspension travel to tyre sizes.

2012 FLSTF Fat Boy - Pros & Cons

Strengths

Accessible seat height: At Laden 635 mm, the seat height is approachable for a wide range of rider heights and builds confidence in low-speed manoeuvring.

Considerations

Age-related wear: As with any used FLSTF Fat Boy, a thorough pre-purchase inspection covering consumables, service history and tyres is always recommended.

Owner Experiences & Common Issues

Low-speed confidence

At 329 kg, the FLSTF Fat Boy is a substantial machine. New owners occasionally mention that slow-speed manoeuvring in car parks takes a little getting used to. Once moving, the weight disappears - but practising slow-speed exercises builds confidence quickly.

FLSTF Fat Boy - Buying & Maintenance Guide

What to check before buying

When inspecting a used 2012 Harley-Davidson FLSTF Fat Boy, start with the basics: check the service book for oil change frequency, inspect the chain and sprockets for wear, and look for oil seepage around the engine casings and rocker covers. A cold start test is invaluable - a well-maintained FLSTF Fat Boy should fire up cleanly and settle to a smooth idle within a few seconds.

Oil and filter changes

Regular oil changes are the single most important maintenance task on any FLSTF Fat Boy. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. Always use the correct viscosity grade as specified in the owner's manual.

2012 Harley-Davidson FLSTF Fat Boy - Frequently Asked Questions

What engine does the 2012 Harley-Davidson FLSTF Fat Boy have?

The 2012 Harley-Davidson FLSTF Fat Boy uses a Four stroke, V-Twin, Twin Cam 103B Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, two valves per cylinder, with Integrated Oil-Cooler engine with 1690 cc of displacement. It is air cooled.

How much does the 2012 Harley-Davidson FLSTF Fat Boy weigh?

The 2012 Harley-Davidson FLSTF Fat Boy weighs 329 kg. This is the manufacturer's wet figure.

How much power does the 2012 Harley-Davidson FLSTF Fat Boy make?

The 2012 Harley-Davidson FLSTF Fat Boy produces 134 Nm @ 3500 rpm of torque.

What is the fuel tank capacity of the 2012 Harley-Davidson FLSTF Fat Boy?

The 2012 Harley-Davidson FLSTF Fat Boy has a 18.9-litre fuel tank.

Is the 2012 Harley-Davidson FLSTF Fat Boy suitable for shorter riders?

The 2012 Harley-Davidson FLSTF Fat Boy has a seat height of Laden 635 mm. This is a comfortable, accessible height for most riders.

What brakes does the 2012 Harley-Davidson FLSTF Fat Boy have?

The 2012 Harley-Davidson FLSTF Fat Boy uses Single 292 mm disc, 4 piston caliper at the front and Single 292 mm disc, 2 piston caliper at the rear.

What tyre sizes does the 2012 Harley-Davidson FLSTF Fat Boy use?

The 2012 Harley-Davidson FLSTF Fat Boy runs 140/75R17 67V front and 200/55R17 78V rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What gearbox does the 2012 Harley-Davidson FLSTF Fat Boy have?

The 2012 Harley-Davidson FLSTF Fat Boy is fitted with a 6 Speed transmission.

Harley-Davidson FLSTF Fat Boy Spec Evolution

The Harley-Davidson FLSTF Fat Boy was produced across 8 model years (1995-2012). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	1995	1998	2007	2008	2009	2010	2011	2012
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
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
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
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
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.
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

Key Specifications

Engine

Four stroke, V-Twin, Twin Cam 103B Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, two valves per cylinder, with Integrated Oil-Cooler

Power

N/A

Torque

134 Nm / 13.7 kgf-m / 98.8 ft. lbs @ 3500 rpm

Top Speed

N/A

Weight

329 kg / 725 lbs

Fuel Capacity

18.9 Litres / 5.0 US gal

Full 2012 Harley-Davidson FLSTF Fat Boy Specifications

Year 2012

Make Model Harley Davidson FLSTF Fat Boy

Max Torque 134 Nm / 13.7 kgf-m / 98.8 ft. lbs @ 3500 rpm

Displacement 1690 cc / 103.1 cub in.

Engine Detail Four stroke, V-Twin, Twin Cam 103B Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, two valves per cylinder, with Integrated Oil-Cooler

Bore x Stroke 98.4 x 111.1 mm

Compression Ratio 9.6:1

Cooling System Air cooled

Exhaust Chrome, over/under shotgun exhaust with dual mufflers

Fuel Induction Electronic Sequential Port Fuel Injection (ESPFI)

Ignition Single-fire, non-wasted, map-controlled spark ignition

Starter Electric