Husqvarna FX 450 - 2021 Specifications and Reviews

The 2021 Husqvarna FX 450 is a versatile enduro machine designed for trail riders seeking a balanced blend of power and manageability. Its 449cc single-cylinder four-stroke engine delivers 63 horsepower with excellent low-to-mid range torque, making it ideal for technical terrain and long-distance off-road riding. Known for its responsive handling and reliable Keihin carburettor fuel system, the FX 450 excels in mixed conditions from rocky trails to sandy terrain.

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General information

CategoryEnduro / offroad
Year2021
ModelHusqvarna FX 450
 
 

Engine and Transmission Specifications

DrivelineX-Ring 5/8 x 1/4´ chain
ClutchWet, DDS multi-disc clutch, Magura hydraulics
Transmission typeChain   (final drive)
Gearbox5-speed
Cooling systemLiquid
IgnitionKeihin EMS
Fuel controlSingle Overhead Cams (SOHC)
Fuel systemCarburettor. 44mm Keihin
Bore x Stroke95.0 x 63.4 mm (3.7 x 2.5 inches)
Compression11.8:1
Power63.0 HP (46.0 kW)
Engine typeSingle cylinder, four-stroke
Capacity:449.9 ccm (27.45 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesSingle disc
Diameter260 mm (10.2 inches)
Front brakesSingle disc
Rear tire140/80-18
Front tire90/90-21
Rear wheel travel300 mm (11.8 inches)
Rear SuspensionWP XACT Monoshock with linkage
Front wheel travel310 mm (12.2 inches)
Front SuspensionWP XACT-USD, Ø 48 mm
Rake (fork angle)26.5°
Frame typeCentral double-cradle-type 25CrMo4 steel

Physical measures and capacities

Fuel capacity8.50 litres (2.25 US gallons)
Wheelbase1482 mm (58.3 inches)
Ground clearance370 mm (14.6 inches)
Seat height950 mm (37.4 inches) If adjustable, lowest setting.
Power/weight ratio0.6219 HP/kg
Dry weight101.3 kg (223.3 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
ElectricalLightweight Li-Ion 2.0 Ah battery
StarterElectric
Color optionsWhite/blue/yellow

Performance Profile & Rider Fit

63 hp
Peak Power
4.2s
0-60 mph

Best For

Track55%
City25%
Cornering80%
Daily Riding20%
Touring20%
Passenger5%

Rider Profile

Best ForThis bike suits experienced off-road riders who are comfortable with a tall, aggressive competition-focused enduro machine.
PurposeBuilt as a cross-country and enduro racing weapon, excelling at technical trails, tight singletrack, and rough terrain rather than road use.
Rider FitThe tall 948mm seat height, minimal padding, and light 103.5kg dry weight demand good rider fitness, leg length, and off-road technique over long motos.
CharacterA razor-sharp, high-revving, race-bred single that rewards aggressive input with explosive power and pinpoint agility.
Not Ideal ForNot suitable for riders seeking a comfortable commuter, a passenger-friendly bike, or long paved-road touring.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2021 Husqvarna FX 450 Rider Ergonomics Assessment

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Feet:

At 950mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2021 Husqvarna FX 450, with a cramped knee angle of around 85 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2021 Husqvarna FX 450 is a top-of-the-line off-road motorcycle that offers a winning combination of power, agility, and performance. With its 450cc engine, this bike delivers impressive power and torque, making it a force to be reckoned with on the trails. The FX 450 also features a lightweight chassis and top-of-the-line suspension components, allowing for excellent handling and control in a variety of off-road conditions. Whether you're racing through the woods or tearing up the desert, the Husqvarna FX 450 is up to the challenge. Overall, the 2021 Husqvarna FX 450 is a standout choice for riders who demand the very best in off-road performance. Its powerful engine, top-notch suspension, and lightweight design make it a force to be reckoned with on the trails. If you're in the market for a high-performance off-road motorcycle, the Husqvarna FX 450 should be at the top of your list.
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