2023 Husqvarna FX 450 Specifications

Name: 2023 Husqvarna FX 450
Brand: Husqvarna

Enduro / Off-Road • Specs last verified 13 July 2026

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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 an 8.50-litre fuel tank, offers a seat height of 948 mm and spans a 1482 mm wheelbase. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2023 Husqvarna FX 450 spec sheet below.

2023 Husqvarna FX 450 compared with other bikes in the Enduro / Off-Road category

Measured against other bikes in the Enduro / Off-Road category in our database (up to 1434 models, one entry per model), the 2023 Husqvarna FX 450 comes out as follows.

With 948 mm, the FX 450 has the joint 234th tallest seat height of 1146 bikes in the Enduro / Off-Road category, 8% above the category average of 879 mm.
Engine displacement of 450 cc is larger than that of 798 of the other 1433 bikes in the Enduro / Off-Road category.
Narrowing the field to the 408 models within five model years of it, the seat height of 948 mm is taller than that of 300 of the other 407.

Versus the 2022 model

The figures we track are unchanged from the 2022 model: displacement and seat height all match.

2023 FX 450 - Pros & Cons

Strengths

Strong front braking: The single disc front brake bites hard and stays consistent - a solid foundation whether it's stock or upgraded with braided lines.

Considerations

Carburetor fuelling: Carburetion is more hands-on than fuel injection - plan on periodic jetting and cleaning as part of routine ownership.
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.
Modest fuel capacity: An 8.50-litre tank keeps things light but means budgeting for more frequent fuel stops on any longer ride.
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 with its 449.9 cc enduro / off-road should cover the same ground every time: service history, drivetrain condition, and any oil seepage around the casings. This model runs chain final drive, so check chain slack and sprocket tooth profile specifically - a worn sprocket is a cheaper fix now than after it's chewed up the next chain. Now 3 years old, this enduro / off-road is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. 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 the FX 450's 449.9 cc single cylinder, four-stroke - keep to the manufacturer's interval rather than stretching it. With a 13.1:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Use the viscosity grade the manual specifies, not whatever's on sale.

Carburetor upkeep

An 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 an 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 an 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	-	-	-	-	-

Key Specifications

Engine

Single cylinder, four-stroke

Power

Not recorded

Torque

Not recorded

Top Speed

Not recorded

Weight

103.5 kg / 228.2 lbs

Fuel Capacity

8.50 litres / 2.25 US gallons

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

Power-to-Weight Ratio 0.6087 HP/kg

Bore x Stroke (in,) 3.7 x 2.5 inches

Bore x Stroke (mm) 95.0 x 63.4 mm

Displacement (cc) 449.9 cc

Displacement (ci) 27.45 cubic inches

Engine Type Single cylinder, four-stroke

Fuel Control Single Overhead Cams (SOHC)

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.