Cruisers

1990Harley-Davidson Fat Boy

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The 1990 Harley-Davidson Fat Boy is an iconic cruiser built for riders seeking classic American styling and relaxed riding comfort. Powered by the legendary 1337cc Evolution V-twin engine, it's best known for its distinctive solid-disc wheels, low-slung chassis, and commanding presence on the road. Its air-cooled engine and accessible seat height make it ideal for both experienced cruiser enthusiasts and riders transitioning to larger motorcycles.

Capacity: 1337.0 ccm
Engine: V-Twin, four-stroke
Gearbox: 5-speed
Dry weight: 295.0 kg
Seat height: 673 mm
Power: 49.0 HP (36.0 kW)

⇄ Compare with another bike All model years

Other years 1990 1991 1992 1993 1994 1995 1996 1997 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail5%

Cornering30%

City riding45%

Daily riding55%

Touring40%

Two-up55%

Track10%

Best for: Built for boulevard cruising and making a bold visual statement rather than outright performance or long-distance touring.
Built for: A muscular, iconic cruiser with a fat rear tire stance, strong low-end torque, and unmistakable classic Harley presence.
Not ideal for: Not the right choice for riders seeking nimble cornering, off-road capability, or a lightweight, agile everyday commuter.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 673mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 1990 Harley-Davidson Fat Boy, with a cramped knee angle of around 75 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 750 mm or under — Short Kings →

Find bikes that fit your height →

Full specifications

Engine

Capacity: 1337.0 ccm
Power: 49.0 HP (36.0 kW)
Engine type: V-Twin, four-stroke
Power/weight ratio: 0.1661 HP/kg (dry)
Bore x stroke: 88.8 x 108.0 mm
Compression: 8.5:1
Cooling system: Air
Fuel system: Injection
Starting: Electric
Valves per cylinder: 2
Torque: Not on record - add it

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Belt

Performance

Top speed: 148.0 km/h (92.0 mph)

Dimensions & weight

Wheelbase: 1651 mm
Overall length: 2365 mm
Overall width: 1016 mm
Seat height: 673 mm
Dry weight: 295.0 kg
Wet weight: 298.0 kg
Fuel capacity: 16.00 litres
Ground clearance: 125 mm

Chassis & suspension

Front suspension: Dual-bending valve 49 mm telescopic with aluminum fork triple clamps; dual rate spring; "beer can" covers
Rear suspension: Hidden, free piston, coil-over monoshock; 43mm stroke; hydraulic preload adjustment
Rake (fork angle): 30.0°
Trail: 104 mm

Brakes & wheels

Front brakes: Single disc
Rear brakes: Single disc
Front tyre: MT 90-16
Rear tyre: MT 90-16

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	1990	1995	2016	2021	2026
Capacity	1337 cc	1337 cc	1690 cc	1868 cc	1923 cc
Dry weight	295 kg	295 kg	284 kg	284 kg	284 kg
Seat height	673 mm	673 mm	654 mm	654 mm	658 mm
Fuel capacity	16 L	16 L	—	—	18.9 L