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2023 Husqvarna FX 450 Overview
For 2023, Husqvarna offers the FX 450 as an enduro / off-road motorcycle with 449.9 cc on tap. The 2023 Husqvarna FX 450 is built around a Single cylinder, four-stroke engine running Single Overhead Cams (SOHC) valve actuation, a compression ratio of 13.1:1. Internally, bore and stroke are 95 x 63.4 mm. In everyday use, the 2023 FX 450 tips the scales at 103.5 kg, carries a 8.50-litre fuel tank, offers a seat height of 948 mm and spans a 1482 mm wheelbase. That's roughly 95.3 kg lighter than the average enduro / off-road motorcycle in our database. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2023 Husqvarna FX 450 spec sheet below.
2023 FX 450 - Pros & Cons
Strengths
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Factory engineering: There's nothing exotic about the 2023 Husqvarna FX 450's spec sheet - just solid, proven engineering for what it's meant to do.
Considerations
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Carburetor fuelling: Carburetion is more hands-on than fuel injection - plan on periodic jetting and cleaning as part of routine ownership.
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Tall seat height: A 948 mm seat puts flat-footing out of reach for a lot of riders - sit on it in person before committing.
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Modest fuel capacity: A 8.50-litre tank keeps things light but means budgeting for more frequent fuel stops on any longer ride.
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Chain final drive upkeep: A chain drivetrain is the most common setup in its class, but it's also the one that demands the most regular hands-on maintenance.
Wear Points & Servicing Notes
Carburetor maintenance
Being carbureted, the FX 450 is more sensitive to stale fuel and altitude changes than a fuel-injected bike - a carb clean and rejet restores crisp throttle response after any extended lay-up.
Valve clearance checks
Valve clearances on Single Overhead Cams (SOHC)-equipped engines like the FX 450's drift slowly with mileage rather than failing suddenly - sticking to the service interval keeps it a non-issue.
Brake disc and pad wear
Single disc up front provides the primary stopping power; inspect disc thickness and pad wear at each tyre change to catch scoring before it becomes a rotor replacement.
Suspension condition on used examples
Suspension duties are handled by WP XACT-USD, Ø 48 mm up front and WP XACT Monoshock with linkage at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.
Final drive maintenance
Chain final drive on the FX 450 means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.
Frame & chassis check
The Central double-cradle-type 25CrMo4 steel chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.
Low-speed handling
The FX 450's 103.5 kg kerb weight makes low-speed control noticeably less effort than on a heavier machine.
FX 450 - Buying & Maintenance Guide
What to check before buying
A pre-purchase check on the 2023 Husqvarna FX 450 should cover the same ground every time: service history, chain and sprocket condition, and any oil seepage around the casings. Start it from cold if you can - a well-kept FX 450 settles to a smooth idle within seconds.
Oil and filter changes
Oil changes are the cheapest insurance you can buy for a FX 450's engine - keep to the manufacturer's interval rather than stretching it. Use the viscosity grade the manual specifies, not whatever's on sale.
Carburetor upkeep
A FX 450 that's sat unused is almost always a carb-cleaning job before it runs right again - float bowls and pilot jets first, since they clog before anything else.
Valve clearance service
There's no reliable seat-of-the-pants way to tell if a FX 450's valve clearances are in spec - a light top-end tick is the only real warning sign, and by then some wear has already happened. Service records are the only proof.
2023 Husqvarna FX 450 - Frequently Asked Questions
What engine does the 2023 Husqvarna FX 450 have?
The 2023 Husqvarna FX 450 uses a Single cylinder, four-stroke engine with 449.9 cc of displacement.
How much does the 2023 Husqvarna FX 450 weigh?
The 2023 Husqvarna FX 450 weighs 103.5 kg. This is the manufacturer's dry figure.
What is the fuel tank capacity of the 2023 Husqvarna FX 450?
The 2023 Husqvarna FX 450 has a 8.50-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 141-170 km between stops.
Is the 2023 Husqvarna FX 450 suitable for shorter riders?
The 2023 Husqvarna FX 450 has a seat height of 948 mm. This is towards the tall end of the spectrum and will require most riders under 175 cm to tiptoe at stops.
What brakes does the 2023 Husqvarna FX 450 have?
The 2023 Husqvarna FX 450 uses Single disc at the front and Single disc at the rear.
What tyre sizes does the 2023 Husqvarna FX 450 use?
The front tyre size on the 2023 Husqvarna FX 450 is 90/90-21.
What fuel system does the 2023 Husqvarna FX 450 use?
The 2023 Husqvarna FX 450 uses Carburettor. 44mm Keihin, providing precise fuelling across the rev range and reliable cold-start behaviour.
Husqvarna FX 450 Spec Evolution
The Husqvarna FX 450 was produced across 7 model years (2017-2023). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.
| Specification |
2017 |
2018 |
2019 |
2020 |
2021 |
2022 |
2023 |
| Dry Weight |
101.6 kg / 224.0 lbs |
101.6 kg / 224.0 lbs |
101.6 kg / 224.0 lbs |
101.6 kg / 224.0 lbs |
101.3 kg / 223.3 lbs |
101.3 kg / 223.3 lbs |
103.5 kg / 228.2 lbs |
| Seat Height |
970 mm / 38.2 in. |
970 mm / 38.2 in. |
950 mm / 37.4 in. |
950 mm / 37.4 in. |
950 mm / 37.4 in. |
950 mm / 37.4 in. |
948 mm / 37.3 in. |
| Fuel Capacity |
8.50 litres / 2.25 gallons |
8.50 litres / 2.25 gallons |
8.50 litres / 2.25 US gallons |
8.50 litres / 2.25 US gallons |
8.50 litres / 2.25 US gallons |
8.50 litres / 2.25 US gallons |
8.50 litres / 2.25 US gallons |
| Displacement (cc) |
449.30 cc |
449.30 cc |
449.9 cc |
449.9 cc |
449.9 cc |
449.9 cc |
449.9 cc |
| Displacement (ci) |
27.42 cubic inches |
27.42 cubic inches |
27.45 cubic inches |
27.45 cubic inches |
27.45 cubic inches |
27.45 cubic inches |
27.45 cubic inches |
| Ground Clearance (in.) |
14.6 inches |
14.6 inches |
14.6 inches |
14.6 inches |
14.6 inches |
14.6 inches |
13.5 inches |
| Ground Clearance (mm) |
370 mm |
370 mm |
370 mm |
370 mm |
370 mm |
370 mm |
343 mm |
| Brakes - Rear Diameter (mm) |
220 mm |
220 mm |
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Key Specifications
Engine
Single cylinder, four-stroke
Power
Not published by manufacturer
Torque
Not published by manufacturer
Top Speed
Not published by manufacturer
Weight
103.5 kg / 228.2 lbs
Fuel Capacity
8.50 litres / 2.25 US gallons
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Full 2023 Husqvarna FX 450 Specifications
Comments
2 engine maps, launch control, traction control.
Colours
White/grey/yellow
Ground Clearance (in.)
13.5 inches
Ground Clearance (mm)
343 mm
Seat Height
948 mm / 37.3 in.
Wheelbase
1482 mm / 58.3 in.
Dry Weight
103.5 kg / 228.2 lbs
Fuel Capacity
8.50 litres / 2.25 US gallons
Fuel Control
Single Overhead Cams (SOHC)
Engine Type
Single cylinder, four-stroke
Displacement (ci)
27.45 cubic inches
Displacement (cc)
449.9 cc
Bore x Stroke (in,)
3.7 x 2.5 inches
Bore x Stroke (mm)
95.0 x 63.4 mm
Fuel System
Carburettor. 44mm Keihin
Compression Ratio
13.1:1
Ignition
Hitachi Astemo EMS
Starter
Electric
Clutch
Wet, DDS multi-disc clutch, Brembo hydraulics
Final Drive
Chain (final drive)
Gearbox
5-speed
Primary Drive
X-Ring 5/8 x 1/4´ chain
Frame Type
Central double-cradle-type 25CrMo4 steel
Suspension - Front
WP XACT-USD, Ø 48 mm
Suspension - Rear
WP XACT Monoshock with linkage
Rake
26.5°
Wheel Travel - Front
305 mm / 12.0 in.
Wheel Travel - Rear
293 mm / 11.5 in.
Brakes - Front
Single disc
Brakes - Rear
Single disc
Rims
D.I.D. rims. Dunlop Geomaxtyres.
Tyres - Front
90/90-21
Specifications are compiled from manufacturer documentation and cross-referenced
technical sources, and corrected on an ongoing basis.
Spot an error? Let us know.
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