The original fat-custom icon is as bold as ever, commanding the road with a steamroller stance, Lakester wheels and a unique headlamp nacelle. The Fat Boy model remains one of the most physically imposing motorcycles in the Harley-Davidson portfolio.
Review – Key Features – Features & Benefits – Specifications
2025 Harley-Davidson Fat Boy: COMMAND THE ROAD.
Introducing the 2025 Harley-Davidson Fat Boy…
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.
New premium paint options and tank medallion embolden the design that has defined the Fat Boy for generations.
The original fat-custom icon is as bold as ever, commanding the road with a steamroller stance, Lakester wheels and a unique headlamp nacelle. The Fat Boy model remains one of the most physically imposing motorcycles in the Harley-Davidson portfolio.
2025 Harley-Davidson Fat Boy Totalmotorcycle.com Key Features
- NEW Milwaukee-Eight 117 Custom powertrain.
- NEW Refreshed paint and graphics feature a new chrome tank medallion with a centered star and a trailing wing, both signature Fat Boy model elements. A new pinstripe layout and two-tone trajectory celebrated in a high contrast Vivid Black and Whiskey Fire color way. Bright chrome exhaust, rear fender struts, engine rocker boxes and covers, fuel tank console and air cleaner cover.
- High-performance Michelin Scorcher 11 tires (Front 160/60R18, Rear 240/40R18) enhance ride and handling performance.
- Exclusive Lakester cast aluminum wheels emphasize a bold stance.
- Trimmed front and rear fenders exaggerate tire size for added presence.
HARLEY-DAVIDSON 2025 CRUISER MOTORCYCLES ARE INFUSED WITH ELEVATED PERFORMANCE AND TECHNOLOGY
New Street Glide Ultra Model with Advanced Touring Comfort and Power Three Limited-Production CVO Models with High-Performance Milwaukee-Eight Engines
MILWAUKEE (January 23, 2025) – Harley-Davidson further advances the performance, technology and style of its Cruiser, Grand American Touring and Custom Vehicle Operation (CVO) motorcycle models powered by the Milwaukee-Eight V-Twin powertrain for 2025. For the coming season, Harley-Davidson offers riders the market’s broadest range of large-displacement motorcycle models.
2025 Cruiser Models Feature New Power and Technology
The Harley-Davidson Cruiser motorcycle collection is infused with new technology, elevated performance and refreshed styling. The Cruiser lineup remains the most diverse in the Harley-Davidson motorcycle portfolio. Each of six very distinctive motorcycles represents a specific stylistic personality, from nostalgic to high performance to boldly custom. The Harley-Davidson Softail chassis with hidden mono shock rear suspension underpins each Cruiser motorcycle. The 2025 Cruiser line includes the following models: Low Rider S, Low Rider ST, Breakout, Heritage Classic, Fat Boy and Street Bob.
Three New Milwaukee-Eight 117 Powertrains – The 2025 Cruiser models will be powered by one of three new Milwaukee-Eight 117 powertrain variants with new cylinder heads, throttle body and intake manifold. Each is tuned – through difference in intake and exhaust scheme and ride mode programming – to offer performance that matches the personality of a specific Cruiser model and the anticipated expectations of that model’s customer. Each engine is Euro V+ Compliant (2024 emissions standards). Shared features of these engines include:
NEW Four-Valve Cylinder Heads feature the combustion chamber shape, oval intake ports and low-profile intake valve seats as introduced on 2023/24 Milwaukee-Eight 117/121 engines for Grand American Touring and CVO models. These heads are designed to improve performance and fuel economy.
NEW Engine Oil is routed from a frame-mounted oil cooler through cylinder head cooling passages. This cylinder head cooling system further optimizes thermal comfort for the rider, especially in low-speed riding situations and hot weather. This air/oil cooled version of the Milwaukee-Eight 117 engine weighs less that the Grand American Touring/CVO versions of the engine and does not require coolant system maintenance.
NEW Contoured Aluminum Intake Manifold offers a more-direct air path and creates a smooth transition from the round throttle body to the new oval intake ports to enhance intake air flow for improved power and reduced exhaust emissions.
NEW Improved Sound Quality as muffler and intake have been designed to enhance sound quality and match the character of each engine variant. Mufflers feature advanced lightweight material that works to trim high frequencies and emphasize low frequencies for a powerful sound.
Dual Counter-Balancers are tuned to eliminate primary vibration at idle while permitting some engine character to shine through at speed.
V-Twin Design with 45-degree cylinder angle maintains classic Harley-Davidson look-sound-feel.
Compression Ratio of 10.3:1 enhances torque at lower RPM and improves fuel economy.
Details of Three Engines
Milwaukee-Eight 117 Classic (powers Street Bob and Heritage Classic models) is tuned with a flat torque curve to deliver satisfying street performance and emphasize ease in rideability. The single muffler and classic round air cleaner produce the distinctive Harley-Davidson sound quality. This engine delivers 120 lb. ft. (163 Nm) peak torque and 98 horsepower (73 kW), 4 percent more power and 1 foot pound more torque (U.S. spec) than the 2024 Milwaukee-Eight 114 engine it replaces for a performance boost. A 2-into-1 exhaust enhances engine tuning by promoting efficient scavenging of exhaust from the engine cylinders.
Milwaukee-Eight 117 Custom (powers Fat Boy and Breakout models) is tuned to deliver 104 horsepower (78 kW) and 126 lb. ft. (171 Nm) peak torque, 6 percent more power and 5 percent more torque (U.S. spec) than the Milwaukee-Eight 117 Classic engine for a performance boost. This engine will provide a significant power increase – 11 percent more horsepower and 6 percent more torque – over the 2024 Fat Boy 114 model. This engine is equipped with a 2-into-2 exhaust with individual catalysts. The Touring-style intake airbox volume is 4.0 liters, approximately 50 percent greater than 2024 Ventilator (Fat Boy model) and Heavy Breather (Breakout model) intakes, which improves power by providing more room for the in-molded velocity stack radius and greater volume of clean air. Intake noise is significantly reduced, which allows a more desirable, rumbling exhaust tone to predominate.
Milwaukee-Eight 117 H.O. (powers Low Rider S and Low Rider ST models) is tuned for riders that consistently seek performance in the upper RPM range and desire an aggressive sound profile. This engine delivers 114 horsepower (85 kW) and 128 lb. ft. peak torque (174 Nm) for an exciting boost in performance – 11 percent more peak horsepower (114 vs 103 horsepower) – compared to the 2024 Milwaukee-Eight 117 in the Low Rider S and Low Rider ST models. The high-performance SE8-511 camshaft developed for the Milwaukee-Eight 121 High Output engine in the CVO Road Glide ST model delivers a top-end performance boost for strong acceleration in the mid and upper RPM range. Engine “redline” intervention is elevated from 5600 rpm (Milwaukee-Eight 117 Classic and Custom engines) to 5900 rpm to give additional throttle headroom under strong acceleration. The Heavy Breather intake features an exposed forward-facing air filter element to maximize flow and adds intake tuning length that improves charging efficiency and peak torque. This intake also gives this engine high-performance style and spirited intake sound on acceleration. A 2-into-1 exhaust enhances engine performance by promoting efficient scavenging of exhaust from the engine cylinders while it delivers a satisfying low rumble at idle and powerful exhaust note under acceleration.
More Power Potential – Each of the new Milwaukee-Eight 117 powertrain variants for Cruiser models offer significantly more performance potential with the installation of Screamin’ Eagle Stage Kits and Screamin’ Eagle intake and exhaust components, compared to 2024 Milwaukee-Eight 114/117 engines.
Shared Harley-Davidson Cruiser Model Features
The following new features apply to each of the six 2025 Harley-Davidson Cruiser models:
NEW Selectable Ride Modes electronically control the performance characteristics of the motorcycle and the level of technology intervention. Each Ride Mode consists of a specific combination of power delivery, engine braking, Cornering Antilock Braking System (C-ABS) and Cornering Traction Control System (C-TCS) settings. The redesigned hand controls incorporate a new right-hand MODE button the rider may use to change the active ride mode while riding the motorcycle or when stopped. A unique icon for each mode appears on the gauge display when that mode has been selected.
Road Mode: Intended for daily use, Road Mode emphasizes a flat torque curve and predictable throttle response for a smooth and easy ride that is great for the city or laying down the country miles.
Rain Mode: Designed to reduce engine torque as engine speed rises due to rear wheel slipping. This gives the rider greater confidence when riding in the rain or when traction is otherwise limited. Rain Mode offers a smooth and more subtle throttle response and deceleration that helps avoid rapid changes in torque and adds another layer of confidence in wet conditions.
Sport Mode: The rider can experience the full performance potential of the motorcycle with an exhilarating torque rise at low engine speeds, full power potential at high engine speeds and the quickest throttle response and more reactive engine breaking on deceleration. Sport Mode is specific to each engine variant:
– Classic Sport Mode features a flat and smooth toque curve with greater low- and high-speed torque that pulls hard in all gears and any speed, making it comfortable, forgiving, and easy to ride for days on end.
– Custom Sport Mode features a broad torque curve with strong mid-range and added torque at low and high speeds for a slight performance gain compared to 2024 Cruiser models with the Milwaukee-Eight 117 engine.
– H.O. Sport Mode features an exhilarating mid-range torque rise and pulls to 5,000 RPM, delivering the most power ever available in a Cruiser model. The rapid rise in torque offers a highly tuned, race-bike feel.
NEW Rider Safety Enhancements by Harley-Davidson is standard equipment on all models. This collection of technologies is designed to enhance rider confidence during unexpected situations or adverse road conditions. Cruiser models feature the following elements of Rider Safety Enhancements by Harley-Davidson:
- Straight Line/Cornering Antilock Braking System (ABS/C-ABS)
- Straight Line/Cornering Traction Control System (TCS/C-TCS)
- Straight Line/Cornering Drag Torque Slip Control (DSCS/C-DSCS)
- Tire Pressure Monitoring (TPMS)
NEW Front and Rear Suspension is re-tuned for optimal performance and to provide improvement in both rider comfort and control. New straight-rate front and rear springs replace progressive-rate springs and contribute to improved balance between the front fork and rear monoshock, reduced harshness and pitch, with more-linear dive response from the front fork under heavy braking. The suspension components – rear coil-over monoshock and front fork – are visually unchanged. Seat height and suspension travel of all models is unchanged from 2024 specs. A remote pre-load adjustment knob on right side cover is no longer a feature on 2025 Fat Boy and Breakout models. Both models have under seat hydraulic pre-load adjustment in 2025.
NEW Hand Controls have been designed to enable the function of new features, to accommodate the new electrical system and to improve ergonomics. A new “flash head lamp to pass” lever is positioned near the left forefinger. Brake lever distance from the hand grip is adjustable for rider reach and preference.
NEW Instrument Displays for all Cruiser models are designed to be exceptionally readable for the rider and to present more information as required by new technical features. An analog speedometer display is above a multi-function LCD digital display. The rider can use the Trip hand control button to scroll through available information in the LCD display. The Low Rider ST, Low Rider S, Breakout and Street Bob models are equipped with a 4-inch diameter instrument. The Heritage Classic and Fat Boy models are equipped with a 5-inch diameter console-mounted instrument.
NEW All-LED Lighting – including headlamp, tail and brake lights and signals – enhance conspicuity. New LED taillights are now equipped with a distinct homogenous element.
NEW USB-C Power Port offers faster data transfer than the previous USB-A port, reversible plug orientation, and compatibility with newer devices. The port location is at the front-left side of the motorcycle beneath the fuel tank.
NEW Heated Gear Connectors have been relocated on all models from behind a side panel to the top of the rear fender below the seat where they are much easier to access. All models have two connectors.
HARLEY-DAVIDSON INTRODUCES NEW STREET GLIDE ULTRA, PAN AMERICA 1250 ST AND SIX REFRESHED CRUISER MODELS FOR 2025 MOTORCYCLE LINE-UP
MILWAUKEE (January 23, 2025) – Harley-Davidson today revealed all-new and refreshed motorcycles for its 2025 model line-up. New to this diverse line of bikes are the Street Glide Ultra, a fully equipped long-haul touring model, and the pavement-ready Pan America 1250 ST adventure sport motorcycle. The 2025 Harley-Davidson Cruiser motorcycle collection includes six models with significantly revised performance and technology features. The powerful Sportster S model is updated with revised suspension for enhanced comfort. The collection of limited-production Custom Vehicle Operation (CVO) motorcycles includes four models and completes the most-desirable portfolio of motorcycles ever offered by Harley-Davidson.
These new Harley-Davidson models complete the collection of 2025 Harley-Davidson Grand American Touring, Cruiser, Sport, Adventure Touring and Trike motorcycles.
NEW 2025 Cruiser Models
The reinvigorated 2025 Cruiser collection includes six very distinctive motorcycles, each infused with new technology, elevated performance and refreshed styling. Each Cruiser model features a new Milwaukee-Eight 117 powertrain and technology advancements and utilizes the Harley-Davidson Softail chassis with hidden mono shock rear suspension. The 2025 Cruiser line includes the following models, each representing a specific stylistic personality, from nostalgic to high performance to boldly custom: Low Rider S, Low Rider ST, Breakout, Heritage Classic, Fat Boy and Street Bob.
NEW 2025 Street Glide Ultra Model
The highway is calling. The new Street Glide Ultra model elevates the long-distance touring experience. This new model combines the comfort, technology, performance and design elements introduced on the 2024 Street Glide with new features intended to support two-up, long-haul travel for riders seeking freedom and adventure. This is the most capable regular-production Grand American Touring motorcycle offered by Harley-Davidson.
NEW 2025 Pan America 1250 ST Model
The new Pan America 1250 ST model is a dynamic adventure sport motorcycle that can be a practical daily ride, an exciting back-road apex chaser, and a capable weekend touring mount. Designed to appeal to riders ready to exchange a sport bike or streetfighter for an agile bike with more comfort and longer distance capability, the Pan America 1250 ST model offers a commanding and comfortable upright rider position, the flexible power delivery of the liquid-cooled Revolution Max 1250 engine, a 17” front wheel, and premium suspension and braking components.
NEW Sportster S Model
Underpinned by newly revised suspension, the Harley-Davidson Sportster S model is designed to deliver an extraordinary riding experience rooted in the thrill of unleashing on-demand torque for an exhilarating blast of thrust and adrenaline. Its light weight, technology features and bold design appeal to experienced riders, new riders and those ready to step away from the crowd on a motorcycle that discards traditional styling tropes. Newly revised front and rear suspension offers a 60 percent increase in rear wheel travel without impacting seat height to improve rider comfort on some pavement conditions. Both front and rear suspension are fully adjustable for compression/rebound damping and preload.
NEW 2025 Harley-Davidson Custom Vehicle Operation Models
For its 26th annual installment, Harley-Davidson CVO models offer discerning riders four super-premium, limited production motorcycle models. Each makes a bold statement of power and prestige and represents the pinnacle of Harley-Davidson style and design with new finish and design details for 2025.
CVO Street Glide and CVO Road Glide models elevate design, technology and performance to meet the expectations of the most demanding and discerning bagger rider.
CVO Road Glide ST model, inspired by the Screamin’ Eagle Factory Team Road Glide bikes competing for the MotoAmerica Mission Foods King of the Baggers championship, combines an exclusive Milwaukee-Eight 121 H.O. engine with a host of high-performance components with attention to custom detail to create a bagger that’s quick, fast and sophisticated.
CVO Pan America model, the program’s adventure touring (ADV) motorcycle, is outfitted with a host of rugged Harley-Davidson Genuine Motor accessories designed to enhance the journey. The CVO Pan America model is capable of seeking adventure where any paved and unpaved route leads its rider.
2025 Harley-Davidson Fat Boy Totalmotorcycle.com Features and Benefits
Paint
The best factory paint in the world covers a classic rounded gas tank that is finished with a new, bold tank medallion.
Wheels
18-inch machined Lakester wheels with massive tires are covered by cutback fenders for powerful stance and commanding presence.
Headlamp Nacelle
The iconic Fat Boy headlight nacelle shines in bright polished chrome, accentuating the large and muscular look of the front end.
PERFORMANCE
The 2025 Fat Boy is more fun than ever before with a new, high-performance Milwaukee-Eight 117 Custom engine, a high-flowing, two-into-two exhaust system, and improved suspension.
Milwaukee-Eight 117 Custom Engine
Milwaukee-Eight 117 Custom V-twin engine delivers sound, feel, and all the power you need for effortless long-mile highway cruising or exhilarating in-town performance.
Rear Suspension
Updated monoshock suspension is more comfortable while still firm and composed during aggressive riding.
Two-into-Two Exhaust
A key feature of Fat Boy design, the two-into-two exhaust has been updated for high-flowing performance and a rich V-twin sound.
INNOVATION
Classic form hides a suite of modern tech made to add comfort and convenience, but never take attention away from the ride.
Five-Inch Analog Display
Analog gauge is clear and easy to read, while an integrated digital display shows key information like Ride Modes.
Hand Controls
Updated hand controls accommodate Cruise Control and newly integrated tech features, including Ride Modes and Traction Control.
USB-C Charging
USB-C charging keeps your devices powered, so you can ride farther while using navigation, listening to music, and staying connected through your Bluetooth headset.
Adjustable Brake Lever
Tune lever distance to maximize braking efficiency regardless of rider reach.
2025 Harley-Davidson Fat Boy – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $22,599 to $23,449 USD
Canada MSRP Price: $27,299 to $28,399 CDN
Europe/UK MSRP Price: £22,795 to 23,895 GBP (On The Road inc 20% Vat)
Australia MSRP Price: $38,495 to $39,340 CDN
| 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. |
2025 Harley-Davidson Fat Boy – Totalmotorcycle.com Canada Specifications/Technical Details
Dimensions
Length
2,365 mm
Width
965 mm
Seat Height, Unladen
675 mm
Ground Clearance
125 mm
Rake
30
Trail
104 mm
Wheelbase
1,650 mm
Tire, Type
Michelin Scorcher 11, front and rear
Tires, Front Specification
160/60R18,70V,BW
Tires, Rear Specification
240/40R18,79V,BW
Fuel Capacity
18.9 l
Oil Capacity (w/filter)
4.7 l
Weight, In Running Order
315 kg
Engine
Engine+
Milwaukee-Eight 117 Custom
Bore
103.5 mm
Stroke
114.3 mm
Displacement
1,923 cc
Compression Ratio
10.3:1
Fuel System+
Electronic Sequential Port Fuel Injection (ESPFI)
Exhaust
2-into-2 staggered; catalyst in muffler
Performance
Engine Torque Testing Method
J1349
Engine Torque+
171 Nm
Engine Torque (rpm)
3000
Horsepower
104 HP / 77 kW @ 4800 rpm
Lean Angle, Right (deg.)
25.6
Lean Angle, Left (deg.)
25.6
Fuel Economy Testing Method
Estimated City/Hwy
Fuel Economy+
5 l/100 km
Drive Train
Primary Drive
Chain, 34/46 ratio
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
Front Fork
Dual-bending valve 49 mm telescopic with aluminum fork triple clamps; dual rate spring; “beer can” covers
Rear Shocks
Hidden, free piston, coil-over monoshock; 43mm stroke; hydraulic preload adjustment
Wheels, Front Type+
Machined, Lakester cast aluminum
Wheels, Rear Type+
Machined, Lakester cast aluminum
Brakes, Caliper Type
4-piston fixed front and 2-piston floating rear
Brakes, Rotor Type
Front and rear silver, Split 7-spoke floating rotors
Electric
Lights (as per country regulation), Headlamp, Tail/Stop/Front Signal Lights
Headlamp: All LED headlamp, low and high beam with signature position lighting; Tail/Stop: Bullet-style, LED stop/tail/turn signals; Front Signal Lights: 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
Rider Safety Enhancements
Anti-lock Brake System (ABS)
Included: ABS is designed to prevent the wheels from locking under braking and helps the rider maintain control when braking in a straight-line, urgent situation.
Traction Control System (TCS)
Included: The TCS is designed to keep the rear wheel from “spinning out” when the motorcycle is accelerating in a straight line and enhances rider confidence.
Drag-torque Slip Control System (DSCS)
Included: DSCS is designed to reduce excessive rear-wheel slip and help prevent rear-wheel lock under powertrain-induced deceleration, which typically occurs when the rider makes an abrupt downshift gear change or quickly reduces the throttle while on wet or slippery road surfaces.
Tire Pressure Monitoring System (TPMS)
Included: TPMS alerts the rider through the information display to low or high tire air pressure. Maintaining proper tire air pressure is important both for vehicle performance and tire life.
Cornering Enhanced Anti-lock Brake System (C-ABS)
Included: C-ABS is a variant of ABS that takes into consideration the lean angle of a two-wheel motorcycle, or the lateral acceleration of a Trike model. The brake pressure required to limit wheel slip when cornering is typically or lower than the pressure required under straight line operation.
Cornering Enhanced Traction Control System (C-TCS)
Included: C-TCS is designed to prevent the rear wheel from excessive spinning under acceleration when going straight or cornering.
Cornering Drag-Torque Slip Control System (C-DSCS)
Included: On bikes equipped with C-DSCS, the system helps keep the rear wheel from slipping or locking up when you quickly downshift or let off the throttle, especially on wet or slippery roads. When turning, it can adjust based on how much a two-wheel bike is leaning or the side-to-side motion on a Trike.
2025 Harley-Davidson Fat Boy – Totalmotorcycle.com Europe Specifications/Technical Details
Dimensions
Length
2,365 mm
Width
965 mm
Seat Height, Unladen
675 mm
Ground Clearance
125 mm
Rake
30
Trail
104 mm
Wheelbase
1,650 mm
Tire, Type
Michelin Scorcher 11, front and rear
Tires, Front Specification
160/60R18,70V,BW
Tires, Rear Specification
240/40R18,79V,BW
Fuel Capacity
18.9 l
Oil Capacity (w/filter)
4.7 l
Weight, In Running Order
315 kg
Engine
Engine+
Milwaukee-Eight 117 Custom
Bore
103.5 mm
Stroke
114.3 mm
Displacement
1,923 cc
Compression Ratio
10.3:1
Fuel System+
Electronic Sequential Port Fuel Injection (ESPFI)
Exhaust
2-into-2 staggered; catalyst in muffler
Performance
Engine Torque Testing Method
EC 134/2014
Engine Torque+
168 Nm
Engine Torque (rpm)
3000
Horsepower
103 HP / 77 kW @ 5020 rpm
Lean Angle, Right (deg.)
25.6
Lean Angle, Left (deg.)
25.6
Fuel Economy Testing Method
EU 134/2014
Fuel Economy+
5.5 l/100 km
CO2 Emissions Testing Method
EU 134/2014
CO2 Emissions
128 g/km CO2
Drive Train
Primary Drive
Chain, 34/46 ratio
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
Front Fork
Dual-bending valve 49 mm telescopic with aluminum fork triple clamps; dual rate spring; “beer can” covers
Rear Shocks
Hidden, free piston, coil-over monoshock; 43mm stroke; hydraulic preload adjustment
Wheels, Front Type+
Machined, Lakester cast aluminum
Wheels, Rear Type+
Machined, Lakester cast aluminum
Brakes, Caliper Type
4-piston fixed front and 2-piston floating rear
Brakes, Rotor Type
Front and rear silver, Split 7-spoke floating rotors
Electric
Lights (as per country regulation), Headlamp, Tail/Stop/Front Signal Lights
Headlamp: All LED headlamp, low and high beam with signature position lighting; Tail/Stop: Bullet-style, LED stop/tail/turn signals; Front Signal Lights: 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
Rider Safety Enhancements
Anti-lock Brake System (ABS)
Included: ABS is designed to prevent the wheels from locking under braking and helps the rider maintain control when braking in a straight-line, urgent situation.
Traction Control System (TCS)
Included: The TCS is designed to keep the rear wheel from “spinning out” when the motorcycle is accelerating in a straight line and enhances rider confidence.
Drag-torque Slip Control System (DSCS)
Included: DSCS is designed to reduce excessive rear-wheel slip and help prevent rear-wheel lock under powertrain-induced deceleration, which typically occurs when the rider makes an abrupt downshift gear change or quickly reduces the throttle while on wet or slippery road surfaces.
Tire Pressure Monitoring System (TPMS)
Included: TPMS alerts the rider through the information display to low or high tire air pressure. Maintaining proper tire air pressure is important both for vehicle performance and tire life.
Cornering Enhanced Anti-lock Brake System (C-ABS)
Included: C-ABS is a variant of ABS that takes into consideration the lean angle of a two-wheel motorcycle, or the lateral acceleration of a Trike model. The brake pressure required to limit wheel slip when cornering is typically or lower than the pressure required under straight line operation.
Cornering Enhanced Traction Control System (C-TCS)
Included: C-TCS is designed to prevent the rear wheel from excessive spinning under acceleration when going straight or cornering.
Cornering Drag-Torque Slip Control System (C-DSCS)
Included: On bikes equipped with C-DSCS, the system helps keep the rear wheel from slipping or locking up when you quickly downshift or let off the throttle, especially on wet or slippery roads. When turning, it can adjust based on how much a two-wheel bike is leaning or the side-to-side motion on a Trike.
Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).
