Model Feature Comparison | 2025 Harley-Davidson Fat Boy® and 2025 Harley-Davidson Fat Boy®

2025 Harley-Davidson Fat Boy® in Washington, Utah — 2025 Harley-Davidson Fat Boy®

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Specs

Features

Specs

General Information

Manufacturer

Harley-Davidson

Model Year

2025

Model

Fat Boy®

Model Code

FLFB

Color

Whiskey Fire / Vivid Black

Brakes/Wheels/Tires

Brakes

Front Caliper Type - 4-piston fixed

Rear Caliper Type - 2-piston floating

Front / Rear Rotor Type - Silver, Split 7-spoke floating

Front Diameter - 11.8 in. (300 mm)

Rear Diameter - 11.5 in. (292 mm)

Front Thickness - 0.2 in. (5 mm)

Rear Thickness - 0.23 in. (5.8 mm)

Anti-Lock Braking System (ABS)

Front Caliper Type - 4-piston fixed

Rear Caliper Type - 2-piston floating

Front / Rear Rotor Type - Silver, Split 7-spoke floating

Front Diameter - 11.8 in. (300 mm)

Rear Diameter - 11.5 in. (292 mm)

Front Thickness - 0.2 in. (5 mm)

Rear Thickness - 0.23 in. (5.8 mm)

Anti-Lock Braking System (ABS)

Wheels

Front / Rear - Machined, Lakester cast aluminum³

Front / Rear Diameter - 18 in. (457 mm)

Front Width - 4.5 in. (114 mm)

Rear Width - 8 in. (203 mm)

Front / Rear - Machined, Lakester cast aluminum³

Front / Rear Diameter - 18 in. (457 mm)

Front Width - 4.5 in. (114 mm)

Rear Width - 8 in. (203 mm)

Tires

Front / Rear Type - Michelin® Scorcher 11

Front - 160 / 60R18, 70V, BW

Rear - 240 / 40R18, 79V, BW

Front / Rear Model - Scorcher 11

Tire Pressure Monitoring System (TPMS)

Front / Rear Type - Michelin® Scorcher 11

Front - 160 / 60R18, 70V, BW

Rear - 240 / 40R18, 79V, BW

Front / Rear Model - Scorcher 11

Tire Pressure Monitoring System (TPMS)

Dimensions

Length

93.1 in. (2,365 mm)

Height

Overall - 44.1 in. (1,120 mm)

Width

40 in. (965 mm)

Weight

As Shipped - 668 lb. (303 kg)

In Running Order - 694 lb. (315 kg)

Gross Vehicle Rating - 1,175 lb. (533 kg)

Gross Axle Rating, Front - 450 lb. (204 kg)

Gross Axle Rating, Rear - 760 lb. (345 kg)

As Shipped - 668 lb. (303 kg)

In Running Order - 694 lb. (315 kg)

Gross Vehicle Rating - 1,175 lb. (533 kg)

Gross Axle Rating, Front - 450 lb. (204 kg)

Gross Axle Rating, Rear - 760 lb. (345 kg)

Ground Clearance

Static - 4.9 in. (125 mm)

Lean Angle Testing Method - J1168

Right / Left Lean Angle - 25.6°

Static - 4.9 in. (125 mm)

Lean Angle Testing Method - J1168

Right / Left Lean Angle - 25.6°

Wheelbase

65 in. (1,650 mm)

Seat Height

Laden - 25.9 in. (658 mm)⁸

Unladen - 26.6 in. (675 mm)

Laden - 25.9 in. (658 mm)⁸

Unladen - 26.6 in. (675 mm)

Drivetrain

Transmission

6-Speed Cruise Drive®

Capacity - 1 qt. (0.95 l)

6-Speed Cruise Drive®

Capacity - 1 qt. (0.95 l)

Primary Drive

Chain, 34/46 ratio

Final Drive

Belt, 32/66 ratio

Chain

Primary Case Capacity - 1.43 qt. (1.35 l)

Electrical

Battery

Sealed, maintenance-free, absorbed glass mat (AGM), 12V, 17.5Ah, 310 CCA at 0°F

Charging - Three-phase, 48A system (364W @13V, 900 rpm, 624W max power @ 13V, 2,000 rpm)

Sealed, maintenance-free, absorbed glass mat (AGM), 12V, 17.5Ah, 310 CCA at 0°F

Charging - Three-phase, 48A system (364W @13V, 900 rpm, 624W max power @ 13V, 2,000 rpm)

Instrumentation

Gauges - 5 in. analog speedometer with digital gear, odometer, fuel level, ride modes, heated gear, traction control, ABS, TPMS, cruise control, clock, trip, range and tachometer indication

Lighting

(As per country regulation)²

Headlamp - All LED, low beam, high beam and signature position lamp

Tail / Stop - Bullet-style

Tail / Stop / Front Signal Lights - Bullet-style, LED turn signals, LED Bullet Turn Signals

(As per country regulation)²

Headlamp - All LED, low beam, high beam and signature position lamp

Tail / Stop - Bullet-style

Tail / Stop / Front Signal Lights - Bullet-style, LED turn signals, LED Bullet Turn Signals

Electrical System

Electric Power Outlet - USB C-Type, Output 5V at 2.4A

Engine

Milwaukee-Eight® 117 Custom⁷

Valves - Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, four valves per cylinder

Air Cleaner - Helix style A / C

Milwaukee-Eight® 117 Custom⁷

Valves - Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, four valves per cylinder

Air Cleaner - Helix style A / C

Horsepower

104 hp (77 kW) @ 4,800 rpm

Displacement

1,923 cc (117 ci)

Bore x Stroke

4.075 x 4.5 in. (103.5 x 114.3 mm)

Torque

126 ft. lb. (171 Nm)⁵ @ 3,000 rpm

Testing method - J1349

Drag-torque Slip Control System (DSCS), Cornering Drag-Torque Slip Control System (C-DSCS)

126 ft. lb. (171 Nm)⁵ @ 3,000 rpm

Testing method - J1349

Drag-torque Slip Control System (DSCS), Cornering Drag-Torque Slip Control System (C-DSCS)

Compression Ratio

10.3:1

Gear Ratio

Overall

1st - 9.311

2nd - 6.454

3rd - 4.793

4th - 3.882

5th - 3.307

6th - 2.79

Overall

1st - 9.311

2nd - 6.454

3rd - 4.793

4th - 3.882

5th - 3.307

6th - 2.79

Clutch

Mechanical, 10 plate wet, assist and conventional

Fuel System

Electronic Sequential Port Fuel Injection (ESPFI)⁶

Exhaust

2-into-2 staggered, catalyst in muffler

Starting

1.6 kW electric with solenoid shift starter motor engagement

Lubrication

System - Pressurized, dry-sump with oil cooler

Fuel Capacity

5 gal. (18.9 l)

Reserve, Fuel Injection (warning light) - 1 gal. (3.8 l)

5 gal. (18.9 l)

Reserve, Fuel Injection (warning light) - 1 gal. (3.8 l)

Oil Capacity

With filter - 5 qt. (4.7 l)

MPG Rating

Estimated City / Hwy - 47 mpg (5 l/100 km)⁴

Operational

Frame

Mild steel, tubular frame, rectangular section backbone, stamped, cast, and forged junctions, MIG welded, aluminum forged fender supports

Mild steel, tubular sections, stamped x-member, forged axle junctions, MIG welded, removable belt spacer

Mild steel, tubular frame, rectangular section backbone, stamped, cast, and forged junctions, MIG welded, aluminum forged fender supports

Mild steel, tubular sections, stamped x-member, forged axle junctions, MIG welded, removable belt spacer

Front Suspension

Travel - 5.1 in. (130 mm)

Rear Suspension

Shocks - Hidden, free piston, coil-over monoshock, 43 mm stroke, hydraulic preload adjustment

Travel - 3.4 in. (86 mm)

Shocks - Hidden, free piston, coil-over monoshock, 43 mm stroke, hydraulic preload adjustment

Travel - 3.4 in. (86 mm)

Rake

Steering head - 30°

Trail

4.1 in. (104 mm)

Fork

Front - Dual-bending valve 49 mm telescopic with aluminum fork triple clamps, dual rate spring, "beer can" covers

Angle - 32°

Front - Dual-bending valve 49 mm telescopic with aluminum fork triple clamps, dual rate spring, "beer can" covers

Angle - 32°

Other

Additional Colors

Billiard Gray

Vivid Black

Blue Burst

Whiskey Fire / Vivid Black

Billiard Gray

Vivid Black

Blue Burst

Whiskey Fire / Vivid Black

Includes

Security System

Cruise Control

Security System

Cruise Control

Warranty

24 months (unlimited mileage)

First 1,000 mi. (1,600 km), every 5,000 mi. (8,000 km) thereafter

24 months (unlimited mileage)

First 1,000 mi. (1,600 km), every 5,000 mi. (8,000 km) thereafter

Features

Design

Premium paint options and tank medallion embolden the design that has defined the Fat Boy for generations.

Features

MILWAUKEE-EIGHT® 117 CUSTOM ENGINE: Massive off-the-line torque and effortless highway-cruising horsepower.
LED LIGHTING: Classic nacelle styling with updated LED lighting.
DUAL 18-INCH MACHINED WHEELS: 18-inch machined wheels give the Fat Boy its signature stance.
INTAKE: Large touring intake increases airflow and engine performance.
REAR WHEEL: Iconic fat tire style and wide contact patch for steady acceleration.

Innovation

Classic form hides a suite of modern tech made to add comfort and convenience, but never take attention away from the ride.

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.

Pricing

California customers are subject to a California Emissions fee; see Dealer for details - $200

Design

Premium paint options and tank medallion embolden the design that has defined the Fat Boy for generations.

Features

MILWAUKEE-EIGHT® 117 CUSTOM ENGINE: Massive off-the-line torque and effortless highway-cruising horsepower.
LED LIGHTING: Classic nacelle styling with updated LED lighting.
DUAL 18-INCH MACHINED WHEELS: 18-inch machined wheels give the Fat Boy its signature stance.
INTAKE: Large touring intake increases airflow and engine performance.
REAR WHEEL: Iconic fat tire style and wide contact patch for steady acceleration.

Innovation

Classic form hides a suite of modern tech made to add comfort and convenience, but never take attention away from the ride.

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.

Pricing

California customers are subject to a California Emissions fee; see Dealer for details - $200

Mon	CLOSED
Tue	10:00 AM - 7:00 PM
Wed	10:00 AM - 7:00 PM
Thu	10:00 AM - 7:00 PM
Fri	10:00 AM - 7:00 PM
Sat	9:00 AM - 5:00 PM
Sun	Closed