Husaberg FC 450 [2004 - 2006]: A Lightweight Beast Built for Adrenaline

Introduction

The Husaberg FC 450, produced between 2004 and 2006, is a motorcycle that demands respect. Designed as a no-compromise motocross weapon and later adapted into the street-slaying FS 450e Supermoto variant, this generation of Husabergs embodies the brand’s ethos of lightweight agility paired with raw power. While Husaberg’s Swedish-Austrian heritage often places it in the shadow of giants like KTM, riding the FC 450 reveals a machine that feels like it was engineered by mad scientists obsessed with balance and responsiveness. Having spent time with both the motocross and supermoto iterations, I can confidently say this bike is more than just a relic—it’s a testament to how focused design can create lasting excitement.

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Engine Performance: Precision Meets Fury

At the heart of the FC 450 lies a 449.3cc liquid-cooled single-cylinder engine, a configuration that screams “race-ready.” With a bore and stroke of 100mm x 57.2mm (3.9 x 2.3 inches) and a compression ratio of 13:1, this engine is tuned for explosive power delivery. The Keihin FCR 41mm carburetor (upgraded to a TPS-equipped version in later models) ensures crisp throttle response, while the Kokusan digital ignition system keeps combustion efficient.

Twist the throttle, and the FC 450 launches forward with a linear yet urgent pull. The 47.8 hp peak power at 6,400 rpm might seem modest by today’s standards, but the way it’s delivered—a seamless blend of mid-range torque (48 Nm at 6,647 rpm) and a satisfying top-end rush—makes it feel larger than life. On dirt tracks, the powerband is forgiving enough for technical sections but aggressive enough to hurl you out of corners. Switch to the FS 450e Supermoto, and that same engine becomes a hooligan’s dream on asphalt, with wheelies feeling effortless and acceleration that pins you to the seat.

The 6-speed transmission (4-speed on early motocross models) is slick and precise, though the hydraulic clutch requires a firm pull. Gear ratios are tightly spaced, keeping the engine in its sweet spot whether you’re navigating tight trails or carving canyon roads.

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Chassis and Handling: A Dance Partner for the Brave

Husaberg’s choice of a 24CrMo4 tempered steel frame strikes a perfect balance between rigidity and flex. The FC 450’s wheelbase of 1,490mm (58.7 inches) and dry weight of 103kg (227 lbs) for motocross models (112kg/246 lbs for the Supermoto) make it feel like a mountain bike with a jet engine. Throwing it into berms or flicking through traffic on the FS 450e inspires confidence—the bike disappears beneath you, responding to even subtle shifts in body weight.

Suspension is where Husaberg flexes its WP partnership. The motocross variant uses WP MXMA 4860 forks with 295mm (11.6 inches) of travel and a WP PDS 5018 shock offering 320mm (12.6 inches) of rear travel. For Supermoto duty, travel is reduced to 275mm (10.8 inches) front and 288mm (11.3 inches) rear, with stiffer damping to handle pavement transitions. Both setups are remarkably plush over small bumps yet resistant to bottoming out under hard landings.

Braking performance is equally impressive. The FS 450e’s 310mm front rotor paired with a 4-piston caliper delivers stoppie-inducing power, while the motocross model’s smaller discs remain fade-free during aggressive laps.

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Ergonomics: Built for Attack

The FC 450’s motocross setup features a towering 930mm (36.6-inch) seat height, which might intimidate shorter riders but positions you perfectly for standing attacks on rough terrain. The Supermoto’s lower 870mm (34.3-inch) seat makes it more accessible while retaining an aggressive, forward-leaning posture. Narrow handlebars and slim bodywork amplify the lightweight feel, though long rides on the Supermoto might leave your wrists begging for a breather.

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Competition: How Does It Stack Up?

In the mid-2000s, the FC 450 faced fierce rivals. Let’s break down its place in the pack:

1. KTM 450 SX (2004-2006):
   KTM’s flagship motocrosser shared similar WP suspension and a 449cc engine but weighed 108kg (238 lbs). The Husaberg’s lighter frame and sharper throttle response gave it an edge in tight sections, though KTM’s broader dealer network made maintenance easier.

2. Husqvarna TC 450:
   Husqvarna’s offering matched the FC 450’s power but leaned heavier at 110kg (242 lbs). The Husaberg’s hydraulic clutch and smoother gearbox gave it a more premium feel.

3. Yamaha YZ450F:
   Yamaha’s 5-speed engine was torquier at low RPMs, but the FC 450’s 6-speed gearbox (on later models) provided better versatility. The YZ also felt bulkier in comparison.

For Supermoto enthusiasts, the FS 450e went toe-to-toe with the KTM 450 SMR and Aprilia SXV 4.5. While the Aprilia’s V-twin howl was intoxicating, its 142kg (313 lbs) weight and finicky reliability made the Husaberg’s simplicity and agility more appealing.

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Maintenance: Keeping the Beast Alive

Owning a Husaberg FC/FS 450 isn’t for the faint of heart—it’s a race bike at its core. Here’s what to prioritize:

1. Oil Changes:
   The wet-sump lubrication system requires fresh oil every 8-10 hours of riding. Use a high-quality 10W-50 synthetic to protect the high-revving engine.

2. Carburetor Tuning:
   The Keihin FCR carb demands regular cleaning, especially if the bike sits unused. Upgrade to a JD Jet Kit for crisper throttle response.

3. Suspension Servicing:
   WP suspension thrives on fresh oil. Rebuild forks and shock every 50-60 hours, or sooner if you’re hitting big jumps.

4. Brake Upgrades:
   While the stock Brembo components are solid, consider MOTOPARTS.store’s sintered brake pads for improved bite and longevity.

5. Chain and Sprockets:
   The O-ring chain lasts well, but switching to a DID 520ERV3 chain and steel sprockets reduces maintenance headaches.

Pro Tip: The FC 450’s 9-liter (2.4-gallon) fuel tank is laughably small for long rides. MOTOPARTS.store offers auxiliary tanks and quick-refuel systems perfect for endurance trails.

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Conclusion: A Cult Classic Worth Reviving

The Husaberg FC 450 isn’t just a motorcycle—it’s a statement. From its razor-sharp handling to its addictive power delivery, this generation proves that lightweight engineering and focused design create timeless machines. While it demands meticulous care, the rewards are unmatched: few bikes from this era feel as alive beneath the rider.

Whether you’re resurrecting a barn find or upgrading your current FC/FS 450, MOTOPARTS.store has the parts and expertise to keep this legend tearing up tracks and streets alike. After all, why ride ordinary when you can pilot a piece of off-road royalty?

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Specifications sheet

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