Bike Display Page - Harley-Davidson Media Site

In Brief

A heavyweight knockout. Adored since day one, the singular Fat Boy stands out with bright chrome and bold finishes, and now it is better than ever with a big Milwaukee-Eight^® 117 Custom V-twin engine.

Specifications

Download Specifications

Dimensions	FLFB Fat Boy®	Notes
Length	93.1 in. (2,365 mm)
Overall Width	40 in. (965 mm)
Overall Height	44.1 in. (1,120 mm)
Seat Height, Laden	25.9 in. (658 mm)	2
Seat Height, Laden (Low seat position)
Seat Height, Laden (High seat position
Seat Height, Laden (Low seat position with optional ARH suspension)
Seat Height, Laden (High seat position with optional ARH suspension)
Seat Height, Unladen	26.6 in. (675 mm)
Seat Height, Unladen (Low seat position)
Seat Height, Unladen (High seat position)
Seat Height, Unladen (Low seat position with optional ARH suspension)
Seat Height, Unladen (High seat position with optional ARH suspension)
Static Ground Clearance	4.9 in. (125 mm)
Dynamic Ground Clearance (with optional suspension)
Rake (steering head)	30
Fork Angle	32
Trail	4.1 in. (104 mm)
Wheelbase	65 in. (1,650 mm)
Tires, Type	Michelin® Scorcher 11, front and rear
Tires, Front Model	Scorcher 11
Tires, Front Specification	160/60R18,70V,BW
Tires, Rear Model	Scorcher 11
Tires, Rear Specification	240/40R18,79V,BW
Fuel Capacity	5 gal. (18.9 l)
Reserve Fuel Capacity, Fuel Injection (warning light)	1 gal. (3.8 l)
Oil Capacity (w/filter)	5 qt. (4.7 l)
Transmission Capacity	1 qt. (.95 l )
Primary Chain Case Capacity	1.43 qt. (1.35 l )
Coolant Capacity	N/A
Weight, As Shipped	668 lb. (303 kg)
Weight, In Running Order	694 lb. (315 kg)
Gross Vehicle Weight Rating	1,175 lb. (533 kg)
Gross Axle Weight Rating, Front	450 lb. (204 kg)
Gross Axle Weight Rating, Rear	760 lb. (345 kg)
Luggage Capacity -Volume	N/A

Engine	FLFB Fat Boy®	Notes
Engine	Milwaukee-Eight® 117 Custom
Valves	Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; four valves per cylinder
Bore	4.075 in. (103.5 mm)
Stroke	4.5 in. (114.3 mm)
Displacement	117 cu in (1,923 cc)
Compression Ratio	10.3:1
Fuel System	Electronic Sequential Port Fuel Injection (ESPFI)	3
Air Cleaner	Helix style A/C
Exhaust	2-into-2 staggered; catalyst in muffler
Lubrication System	Pressurized, dry-sump with oil cooler

Drivetrain	FLFB Fat Boy®	Notes
Primary Drive	Chain, 34/46 ratio
Final Drive	Belt, 32/66 ratio
Clutch	Mechanical, 10 plate wet, assist & conventional
Transmission	6-Speed Cruise Drive®
Gear Ratios (overall) 1st	9.311
Gear Ratios (overall) 2nd	6.454
Gear Ratios (overall) 3rd	4.793
Gear Ratios (overall) 4th	3.882
Gear Ratios (overall) 5th	3.307
Gear Ratios (overall) 6th	2.79

Chassis	FLFB Fat Boy®	Notes
Frame	Mild steel, tubular frame; rectangular section backbone; stamped, cast, and forged junctions; MIG welded; aluminum forged fender supports
Swingarm	Mild steel, tubular sections, stamped x-member, forged axle junctions; MIG welded; removable belt spacer
Front Fork	Dual-bending valve 49 mm telescopic with aluminum fork triple clamps; dual rate spring; "beer can" covers
Front Fork, Optional
Rear Shocks	Hidden, free piston, coil-over monoshock; 43mm stroke; hydraulic preload adjustment
Rear Shocks, Optional
Wheels, Optional Style Type	N/A	4
Wheels, Front Type	Machined, Lakester cast aluminum	4
Wheels, Front Diameter	18 in. (457 mm)
Wheels, Front Width	4.5 in. (114 mm)
Wheels, Rear Type	Machined, Lakester cast aluminum	4
Wheels, Rear Diameter	18 in. (457 mm)
Wheels, Rear Width	8 in. (203 mm)
Brakes, Caliper Type	4-piston fixed front and 2-piston floating rear
Brakes, Rotor Type	Front and rear silver, Split 7-spoke floating rotors
Brakes, Front Diameter	11.8 in. (300 mm)
Brakes, Front Thickness	0.2 in. (5 mm)
Brakes, Front is dual	No
Brakes, Rear Diameter	11.5 in. (292 mm)
Brakes, Rear Thickness	0.23 in. (5.8 mm)
Brakes, Anti-Lock Braking System (ABS)	Standard
Suspension Travel, Front	5.1 in. (130 mm)
Suspension Travel, Rear	3.4 in. (86 mm)

Performance	FLFB Fat Boy®	Notes
Engine Torque Testing Method	J1349
Engine Torque	126 ft-lb (171 Nm)	5
Engine Torque (rpm)	3,000
Power	104 HP / 77 kW @ 4800 rpm
Lean Angle Testing Method	J1168
Lean Angle, Right (deg.)	25.6
Lean Angle, Left (deg.)	25.6

Electric	FLFB Fat Boy®	Notes
Battery	Sealed, maintenance-free, absorbed glass mat (AGM) battery, 12V, 17.5Ah, 310 CCA at 0°F
Charging	Three-phase, 48 Amp system (364 Watts @13 Volts, 900 rpm, 624 Watts max power @ 13 Volts, 2000 rpm)
Starting	1.6 kW electric with solenoid shift starter motor engagement
Lights (as per country regulation), Headlamp	All LED headlamp, low and high beam with signature position lighting
Lights (as per country regulation), Tail/Stop	Bullet-style, LED stop/tail/turn signals
Lights (as per country regulation), Front Signal Lights	LED Bullet Turn Signals
Lights, Rear Turn Signals	LED Bullet Turn Signals
Gauges	5-inch analog speedometer with digital gear, odometer, fuel level, ride modes, heated gear, traction control, ABS, TPMS, cruise control, clock, trip, range and tachometer indication
Auxiliary Lamps	N/A
Electric Power Outlet	USB C-Type , Output 5V at 2.4 Amp
GPS System	N/A
Reverse Gear	N/A

Fuel Economy & CO₂ Emissions	FLFB Fat Boy®	Notes
Fuel Economy Testing Method	Estimated City/Hwy
Fuel Economy	47 mpg (5 l/100 km)
Infotainment	FLFB Fat Boy®
Infotainment system	N/A
Screen Size	N/A
Type	N/A
Watts Per Channel	N/A
Speakers	N/A
Speaker Size	N/A
Headset Specifications (if equipped)	N/A
AM	N/A
FM	N/A
MW	N/A
LW	N/A
Weather Band (WB)	N/A
SD Card, Flash Drive and MP3 - via USB Connection	N/A
Hands-free Mobile Phone - via Bluetooth	N/A
Voice Recognition Languages: Phone functions only	N/A
Rider/Passenger Intercom	N/A
Vehicle Information Screen (Air temperature, oil pressure and EITMS)	N/A
Text-to-Speech (TTS) Languages	N/A
USB	N/A
Phone Connectivity	N/A
Bluetooth	N/A
Navigation - via Bluetooth	N/A

Rider Safety Enhancements	FLFB Fat Boy®	Notes
Anti-lock Brake System (ABS)	Included
Electronic Linked Braking (ELB)	N/A
Traction Control System (TCS)	Included
Drag-torque Slip Control System (DSCS)	Included
Vehicle Hold Control (VHC)	N/A
Tire Pressure Monitoring System (TPMS)	Included
Wheel Lift Mitigation	N/A
Cornering Rider Safety Enhancements	FLFB Fat Boy®
Cornering Enhanced Anti-lock Brake System (C-ABS)	Included
Cornering Enhanced Electronic Linked Braking (C-ELB)	N/A
Cornering Enhanced Traction Control System (C-TCS)	Included
Cornering Drag-Torque Slip Control System (C-DSCS)	Included
Enhanced Lift Mitigation	N/A

Warranty And Service	FLFB Fat Boy®	Notes
Warranty	24 months (unlimited mileage)	6
Service Interval	First 1,000 miles (1,600 km), every 5,000 miles (8,000 km) thereafter	7

Footnotes	FLFB Fat Boy®
1	Vehicles depicted may differ from vehicles manufactured and delivered. Specifications and prices listed may differ from specifications and prices of vehicles manufactured and delivered. All product descriptions (including depictions, specifications, dimensions, measurements, ratings and competitive comparisons) are based on available information at the time of publication. Although such descriptions are believed correct, errors and changes can occur and complete accuracy cannot be guaranteed. Harley-Davidson may make changes at any time to prices and specifications, and may change or discontinue models, without notice and without incurring any obligation. Attention: Vehicles in the configurations shown and many of the accessories described in this catalog may not be available for sale or use in some locations. Please check with your dealer for complete product details and the latest information. All models feature 6-speed transmission (VRSC™ models and Sportster® models are 5-speed) and carbon fiber belt final drive; multi-plate clutch with diaphragm spring in oil bath; and 2-year unlimited mileage warranty.
2	Measurement reflects 180 lb. (81.7 kg) operator weight.
3	Recommended 91 octane or higher fuel (R+M)/2.
4	Standard and optional wheels may vary by country and region.
5	Values shown are nominal. Performance may vary by country and region.
6	See motorcycle owner’s manual for complete details.
7	Inspections of certain systems and components are required at 2,500 mile (4,000 km) intervals. See Owner’s Manual for full details.