Compare Models: 2025 Harley-Davidson Fat Boy® Gray Ghost vs 2025 Harley-Davidson Fat Boy® Gray Ghost at San Jacinto Harley-Davidson in Pasadena, TX

Manufacturer

Harley-Davidson

Model Year

2025

Model

Fat Boy® Gray Ghost

Model Code

FLSTFI

Color

Gray Ghost

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 Brake System (ABS), Traction Control System (TCS), Cornering Enhanced Anti-lock Brake System (C-ABS), Cornering Enhanced Traction Control System (C-TCS)

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 Brake System (ABS), Traction Control System (TCS), Cornering Enhanced Anti-lock Brake System (C-ABS), Cornering Enhanced Traction Control System (C-TCS)

Wheels

Front / Rear - Machined, Lakester cast aluminum⁴

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 aluminum⁴

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)

Length

93.1 in. (2,365 mm)

Height

Overall - 44.1 in. (1,120 mm)

Width

Overall - 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)²

Unladen - 26.6 in. (675 mm)

Laden - 25.9 in. (658 mm)²

Unladen - 26.6 in. (675 mm)

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)

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)

Headlamp - All LED, low and high beam with signature position lighting

Tail / Stop - Bullet-style, LED stop / tail / turn signals

Front / Rear Signal Lights - LED Bullet Turn Signals

(As per country regulation)

Headlamp - All LED, low and high beam with signature position lighting

Tail / Stop - Bullet-style, LED stop / tail / turn signals

Front / Rear Signal Lights - LED Bullet Turn Signals

Electrical System

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

Engine

Milwaukee-Eight® 117 Custom

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

Air Cleaner - 9 in. (229 mm) round, center bolt cover with washable fiberglass filter media

Milwaukee-Eight® 117 Custom

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

Air Cleaner - 9 in. (229 mm) round, center bolt cover with washable fiberglass filter media

Horsepower

101 hp (75 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

122 ft. lb. (166 Nm)⁵ @ 3,000 rpm

Testing method - J1349

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

122 ft. lb. (166 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)³

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 - 49 mpg (4.8 l / 100 km)

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

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 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°

Includes

Security System¹⁰

Cruise Control

Security System¹⁰

Cruise Control

Warranty

24 months (unlimited mileage)⁶

Service Interval - First 1,000 mi. (1,600 km), every 5,000 mi. (8,000 km) thereafter⁷

24 months (unlimited mileage)⁶

Service Interval - First 1,000 mi. (1,600 km), every 5,000 mi. (8,000 km) thereafter⁷

Compare Models

2025 Harley-Davidson Fat Boy® Gray Ghost

2025 Harley-Davidson Fat Boy® Gray Ghost

General Information

Brakes/Wheels/Tires

Dimensions

Drivetrain

Electrical

Engine

Operational

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Features

Features