2021 Husqvarna FX 350 Specifications

Name: 2021 Husqvarna FX 350
Brand: Husqvarna

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

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2021 Husqvarna FX 350 Overview

Husqvarna FX 350 is an enduro / off-road motorcycle, displacing 349.7 cc. Power comes from a Single cylinder, four-stroke engine running Double Overhead Cams/Twin Cam (DOHC) valve actuation, a compression ratio of 11.1:1. Bore and stroke come in at 88 x 57.5 mm. On the road, the 2021 FX 350 tips the scales at 100.5 kg, carries an 8.50-litre fuel tank, offers a seat height of 950 mm and spans a 1482 mm wheelbase. The full 2021 Husqvarna FX 350 spec sheet below covers every technical detail, from suspension travel to tyre sizes.

2021 Husqvarna FX 350 compared with other bikes in the Enduro / Off-Road category

We checked the recorded figures for the 2021 Husqvarna FX 350 against up to 1434 bikes in the Enduro / Off-Road category in our database, counting each model once at the model year nearest to this one.

Only 176 of the other 1145 bikes in the Enduro / Off-Road category have a taller seat height than the 950 mm of the FX 350.
With 350 cc, the FX 350 has the joint 633rd smallest engine displacement of 1434 bikes in the Enduro / Off-Road category, 28% below the category average of 486 cc.
Narrowing the field to the 471 models within five model years of it, the seat height of 950 mm is taller than that of 351 of the other 470.

Versus the 2020 model

The figures we track are unchanged from the 2020 model: displacement and seat height all match.

2021 FX 350 - Pros & Cons

Strengths

Strong front braking: Stopping power up front is strong thanks to the single disc setup, with plenty of room to upgrade further with braided lines.

Considerations

Carburetor fuelling: Expect to spend more time keeping the carbs in tune, especially after long storage periods or a change in altitude.
Tall seat height: At 950 mm, shorter riders will likely be on tiptoes at a standstill - worth sitting on one before you buy.
Modest fuel capacity: Range between stops is limited by the 8.50-litre tank - plan fuel stops accordingly on longer routes.
Chain final drive upkeep: Budget time for routine chain maintenance - it's cheap to replace but needs consistent attention to avoid premature sprocket wear.

Wear Points & Servicing Notes

Carburetor maintenance

Carburetors on the FX 350 need periodic attention - pilot jets and float needles are the first parts to gum up after the bike sits, and the first thing to check if idle or throttle response degrades.

Valve clearance checks

With Double Overhead Cams/Twin Cam (DOHC) valve gear, the FX 350 needs periodic clearance checks; caught early they're a cheap adjustment, left unchecked they accelerate valve seat wear.

Brake disc and pad wear

Braking up front comes from single disc with Brembo twin-piston floating calliper - solid stopping power, with disc and pad wear best checked on the same schedule as tyre changes.

Suspension condition on used examples

The FX 350's suspension runs WP XACT-USD, Ø 48 mm at the front. The rear uses WP XACT Monoshock with linkage. Fork-seal condition and rear linkage play are the two things worth checking before buying used.

Final drive maintenance

The FX 350 uses chain final drive, which is cheap to replace but needs regular cleaning, lubrication and tension checks to get a full service life out of the sprockets.

Frame & chassis check

Built around a Central double-cradle-type 25CrMo4 steel, the FX 350's chassis is straightforward to inspect: look for corrosion, cracks or repair welds around stress points like the head-stock and swingarm mounts.

Low-speed handling

100.5 kg keeps the FX 350 easy to move around in tight spaces, car parks and on the stand alike.

FX 350 - Buying & Maintenance Guide

What to check before buying

Before handing over money for a used 2021 Husqvarna FX 350 with its 349.7 cc enduro / off-road, cover the fundamentals: service book and oil change history, drivetrain wear, and any sign of oil weeping 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 5 years old, this enduro / off-road is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. Cold-starting it yourself tells you a lot - a healthy FX 350 should catch quickly and settle into a smooth idle.

Oil and filter changes

Nothing protects the FX 350's 349.7 cc single cylinder, four-stroke like disciplined oil changes - stay on the manufacturer's schedule (roughly every 6,000 km or annually). With an 11.1:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Match the viscosity grade to what the owner's manual specifies, not what's cheapest.

Carburetor upkeep

Deposits in the carbs are the usual culprit behind poor running on a stored FX 350 - strip and clean the float bowls before the first start. Pilot jets clog first and get overlooked most, so make a point of checking them.

Valve clearance service

Valve clearances are easy to overlook on a used FX 350 since a bike out of spec doesn't always feel obviously wrong - but the wear it causes is real. Ask the seller for documentation before assuming it's been done.

2021 Husqvarna FX 350 - Frequently Asked Questions

What engine does the 2021 Husqvarna FX 350 have?

The 2021 Husqvarna FX 350 uses a Single cylinder, four-stroke engine with 349.7 cc of displacement.

How much does the 2021 Husqvarna FX 350 weigh?

The 2021 Husqvarna FX 350 weighs 100.5 kg. This is the manufacturer's dry figure.

What is the fuel tank capacity of the 2021 Husqvarna FX 350?

The 2021 Husqvarna FX 350 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 2021 Husqvarna FX 350 suitable for shorter riders?

The 2021 Husqvarna FX 350 has a seat height of 950 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 2021 Husqvarna FX 350 have?

The 2021 Husqvarna FX 350 uses single disc with Brembo twin-piston floating calliper at the front and single disc with Brembo single-piston floating calliper at the rear.

What tyre sizes does the 2021 Husqvarna FX 350 use?

The front tyre size on the 2021 Husqvarna FX 350 is 90/90-21.

What fuel system does the 2021 Husqvarna FX 350 use?

The 2021 Husqvarna FX 350 uses Carburettor, providing precise fuelling across the rev range and reliable cold-start behaviour.

Husqvarna FX 350 Spec Evolution

The Husqvarna FX 350 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	100.6 kg / 221.8 lbs	100.6 kg / 221.8 lbs	100.6 kg / 221.8 lbs	100.6 kg / 221.8 lbs	100.5 kg / 221.6 lbs	100.5 kg / 221.6 lbs	102.7 kg / 226.4 lbs
Seat Height	960 mm / 37.8 in.	960 mm / 37.8 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
Ground Clearance (mm)	370 mm	370 mm	370 mm	370 mm	370 mm	370 mm	343 mm
Ground Clearance (in.)	14.6 inches	14.6 inches	14.6 inches	14.6 inches	14.6 inches	14.6 inches	13.5 inches
Displacement (cc)	349.70 cc	349.70 cc	349.7 cc	349.7 cc	349.7 cc	349.7 cc	349.7 cc
Brakes - Front Diameter (in.)	10.2 inches	10.2 inches	-	-	-	-	-
Brakes - Front Diameter (mm)	260 mm	260 mm	-	-	-	-	-

Key Specifications

Engine

Single cylinder, four-stroke

Power

Not recorded

Torque

Not recorded

Top Speed

Not recorded

Weight

100.5 kg / 221.6 lbs

Fuel Capacity

8.50 litres / 2.25 US gallons

Full 2021 Husqvarna FX 350 Specifications

Colours White/blue/yellow

Ground Clearance (in.) 14.6 inches

Ground Clearance (mm) 370 mm

Seat Height 950 mm / 37.4 in.

Wheelbase 1482 mm / 58.3 in.

Dry Weight 100.5 kg / 221.6 lbs

Fuel Capacity 8.50 litres / 2.25 US gallons

Power-to-Weight Ratio 0.5771 HP/kg

Bore x Stroke (in,) 3.5 x 2.3 inches

Bore x Stroke (mm) 88.0 x 57.5 mm

Displacement (cc) 349.7 cc

Displacement (ci) 21.34 cubic inches

Engine Type Single cylinder, four-stroke

Fuel Control Double Overhead Cams/Twin Cam (DOHC)

Engine Detail Polished camshafts and DLC coated finger followers

Fuel System Carburettor

Compression Ratio 11.1:1

Ignition Keihin EMS

Starter Electric

Valve System 4

Clutch Wet, DDS multi-disc clutch, Magura hydraulics

Final Drive Chain (final drive)

Gearbox 6-speed

Primary Drive 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 26.1°

Wheel Travel - Front 310 mm / 12.2 in.

Wheel Travel - Rear 300 mm / 11.8 in.

Brakes - Front Single disc. Brembo twin-piston floating calliper

Brakes - Rear Single disc. Brembo single-piston floating calliper

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.