HUSQVARNA FS 450 2025

ENGINE

The FS 450 engine is engineered for peak performance, benefiting from cutting-edge design techniques. Weighing just 26.8 kilograms, its lightweight construction plays a pivotal role in improving overall agility and responsiveness. Positioned strategically to centralize mass, the engine enhances handling by promoting better balance and maneuverability, while also significantly boosting anti-squat behavior in the chassis.Furthermore, servicing the FS 450 engine is notably easier compared to previous models, thanks to integrated service markers on the engine cases. These markers streamline maintenance tasks by clearly indicating service points and intervals, ensuring smoother upkeep and prolonged optimal performance.

CYLINDER HEAD

The SOHC cylinder head is incredibly compact with the camshaft positioned as close to the centre of gravity as possible to aid handling and agility. A durable, fine-punched cam chain runs on low-friction chain guides for optimal efficiency and reliability with a single oil spray jet guaranteeing effective cooling. The lightweight valves are actuated via a rocker arm and feature timing specifically designed to deliver precise levels of torque and throttle response.

CYLINDER & PISTON

The lightweight aluminium cylinder is undoubtedly an engineering masterpiece and features a 95 mm bore with a 63.4 mm stroke. Inside, the CP bridged-box-type piston features anodised annular grooves, adding durability and longer service intervals at a weight of just 327 g. The compression ratio is 13.6:1 for incredible peak power, which ensures the FS 450 remains firmly at the front of the pack.

CRANKSHAFT

The crankshaft is specifically positioned to harness the rotating mass in the ideal centre of gravity resulting in a lightweight and agile handling feel. As such, the inertia produced by the crankshaft is carefully calculated to deliver optimal traction and rideability from the powerful 450 cc engine. A plain big end bearing comprising two force-fitted bearing shells ensure maximum reliability and durability, for long service intervals of 90 hours.

CRANKCASES

Designed for optimised mass centralisation, the FS 450 crankcases arrange the shafts and engine internals in the perfect position to achieve the best possible handling. Manufactured using a high-pressure die-cast production process, the result is a thin, exceptionally strong wall thickness at the lowest possible weight..

ANTI HOPPING CLUTCH

The FS 450 features a Suter anti-hopping clutch to prevent rear wheel instability and hopping when braking hard into the apex of a turn for total control and perfect drifting. It reduces the physical efforts required by the rider and improves lap times

GEARBOX

Produced by Pankl Racing Systems, the 5-speed gearbox is designed to be extremely light and durable while featuring an optimised and proven gear ratio (29:72). Integrated into the shift drum, the Quickshifter sensor can be activated by pressing the QS marked button on the Map Select Switch to further aid seamless upshifting.

LIGHTWEIGHT FRAME

The geometry of the proven chromium molybdenum steel frame is retained for 2025 while subtle revisions to its construction further enhance the riding experience. In addition to new engine mounts, material has been removed from the frame around the upper shock mount and steering head for improved chassis flex with the additional benefit of saving weight. All riders will notice these changes, particularly when entering corners, and enjoy confidence-inspiring stability at speed. The frame is finished off with a premium metallic blue powder coating with standard frame protectors offering superior protection, durability, and grip in all conditions. Additionally, the inclusion of forged brackets on the lower frame rails allows for easy installation of the skid plate, which is available as a Technical Accessory.

POLYAMIDE-REINFORCED ALUMINIUM SUBFRAME

Made from 60% polyamide and 40% aluminium, the two-piece subframe ensures exceptional strength and durability at an overall weight of just 1.8 kg. The lower subframe spars and frame mounts are manufactured from cast aluminium for reliability while the upper section of the subframe is made from injection-molded polyamide. The materials used to construct the subframe are chosen as they enable specific flex characteristics at the lowest possible weight.

CNC MACHINED TRIPLE CLAMPS

Working in perfect unison with the frame design and suspension set-up, the CNC-machined triple clamps provide precisely calculated geometry for increased stability. Customised handlebar flex can be achieved by the handlebar clamp, which offers two mounting options - rubber-damped for less vibration, or fixed for enhanced front-end feedback. The upper triple clamp ensures a smooth fork action and plays a vital role in the alignment of the front wheel for superior handling.

WP XACT FRONT SUSPENSION

For the first time ever, the FS 450 is equipped with 48 mm WP XACT Closed Cartridge forks. These forks offer consistent damping thanks to an advanced design that includes a unique mid-valve piston concept to optimise oil flow and prevent foaming. Bottoming resistance is assured thanks to the hydrostop, which applies a progressive damping force in the last 68 mm of travel, to ensure no loss of forward momentum after heavy landings. Compression and rebound settings remain easily adjustable by hand with the pump needed to adjust the air pressure in the forks provided with each machine. The fork seals are made by industry leader SKF and offer exceptional protection against dirt intrusion for continued suspension performance.

WP XACT SHOCK ABSORBER

The hollow swingarm is manufactured from a single piece of aluminium using a die-cast production process for optimal stiffness with a minor revision for 2025 contributing to the durability of the new chain slider. In order to optimise and match the flex characteristics from the frame, a 22 mm rear axle is fitted.

SWINGARM

The hollow swingarm is manufactured from a single piece of aluminium using a die-cast production process for optimal stiffness. In order to optimise and match the flex characteristics from the frame, a 22 mm rear axle is fitted.

BODYWORK

Revised radiator shrouds create a progressive new look and complement the ergonomic bodywork of the FS 450. They also eliminate the shock cover for easy access to the adjusters on the WP XACT shock. The contact points in the rider triangle are further refined for 2025 with the introduction of a new seat that is 5 mm higher and wider at its lowest point when compared to the previous model. This revision enhances rider manoeuvrability on the motorcycle and leads to a heightened level of control, especially when exiting corners.

AIRBOX

A stronger air inlet sleeve for 2025 prevents air deformation and, together with all inlet ducts positioned to maximise airflow, unrivalled performance is guaranteed. The Twin Air filter is easily accessed without tools by simply removing the left side panel for easy maintenance. Included with each FS 450 is an optional, vented side panel that can be installed by hand and thanks to the additional flow of air, all riders will benefit from a sharper throttle response.

HYDRAULIC CLUTCH

The high-performance Brembo hydraulic clutch system guarantees even wear, near maintenance-free operation, and perfect action in every condition. This means that play is constantly compensated so that the pressure point and function of the clutch remain identical in cold or hot conditions, as well as over time. Countless hours of race-focused testing have proven the high-quality, and exceptional reliability of the Italian-made Brembo hydraulic system.

HYDRAULIC BRAKES

Exceptional stopping power is guaranteed with Brembo brakes, which feature a 4-piston, radially mounted monoblock calliper in combination with a 310 mm disc at the front. A single piston calliper and a 220 mm disc are fitted to the rear. The perfectly placed controls allow for optimal feel in all conditions while a stronger rear brake pedal improves durability.

PROTAPER HANDLEBAR

Developed between Husqvarna Motorcycles and leading handlebar manufacturer ProTaper, the exclusive bend offers superior comfort, class-leading strength, and fatigue resistance at the lowest possible weight.

ODI GRIPS

ODI lock-on grips feature an innovative, integrated throttle mechanism and a glue-free installation. The throttle assembly offers easy free-play adjustment with the option to fit alternative cams for a personalised throttle action.

FOOTRESTS

New, slightly smaller footrests are low in weight and engineered to be less susceptible to scraping on the asphalt when the FS 450 is drifted through corners. The new design also ensures exceptional grip and control at every point of the race track for a confidence-inspiring riding experience

WHEELS AND TYRES

Black 16.5'' and 17'' Alpina spoked wheels on the front and rear respectively are lightweight and strong. Metzeler Racetec SM K1 125/75 R420 and 165/55 R420 slick tyres are fitted for maximum grip, traction, and agility.

EXHAUST SYSTEM

The exhaust system on the FS 450 features a flow-designed resonance chamber, which plays a vital role in delivering class-leading performance. Manufactured in two pieces and designed to be as compact as possible, the header pipe allows for the system to be removed without removing the rear shock. The silencer has a short and efficient design, moving weight closer to the centre of gravity and ensuring impressive power while keeping noise as low as possible. A black coating highlights its premium quality.

COOLING SYSTEM

Manufactured from high-strength aluminium, the radiators are designed using computational fluid dynamics (CFD) to channel air in the most effective way. A large centre tube channels coolant through the frame to reduce pressure at this point in the system for a more consistent flow while an internal thermostat further enhances reliability.

FUEL TANK

The 7.2 litre fuel tank integrates neatly into the ergonomic bodywork and features a fuel pump design that allows the tank to be emptied further for increased running times. For improved safety, the external fuel line is specifically routed to make it less exposed and susceptible to damage while a stronger rubber cushion beneath the tank provides a more secure fitment and protects the frame from wear.

MAP SELECT SWITCH

The intuitive handlebar-mounted Map Select Switch allows riders to activate Launch and Traction Control, enable the Quickshifter, and allow riders to toggle between two engine maps. The easy-to-operate component allows for quick changes to the engine characteristics based on track conditions and rider preference.

QUICKSHIFT

The Quickshifter can be activated or deactivated via the Map Select Switch. The function works only when upshifting, and interrupts the ignition for a fraction of a second. This allows for smooth gear changes while the throttle is fully open and without the use of the clutch. To prevent unintended shifts and false neutrals, the function is only active from second gear upwards.

TRACTION CONTROL

Traction Control on the FS 450 is engaged by a button marked 'TC' on the Map Select Switch and functions by analysing throttle input from the rider and the rate at which engine RPM increases. If the RPM increases too quickly, the engine management system (EMS) registers a loss of grip and reduces the amount of power to the rear wheel to ensure maximum traction. This is a distinct advantage in wet and slippery conditions.

LAUNCH CONTROL

With the engine at idle, Launch Control is engaged by pressing the Traction Control and Quickshifter buttons simultaneously. Both symbols will start flashing to indicate that launch control is active. This function limits the amount of power to the rear wheel, improving traction, and preventing loss of control under hard acceleration. Once a gear change is made, Launch Control will deactivate automatically. Additionally, the Quickshifter is deactivated when Launch Control mode is engaged.

MAPPING

For personalised power delivery, the FS 450 has two built-in engine maps as standard. Map 1 (white) offers linear, predictable power, while map 2 (green) is more aggressive for a sharper throttle response and more explosive power output.

EMS

The engine management system (EMS) is designed to be small, light, and fast at processing data. It incorporates a rollover sensor (ROS) which cuts the ignition and shuts off the engine in the event of a severe crash for an additional layer of safety.

HOUR METER

The hour meter comes with an integrated fuel level indicator which is visible on the FI status LED, to clearly show when the fuel level is becoming low.

START/STOP SWITCH

A combined start/stop switch is located on the right side of the handlebar for easy, thumb-operated use. Not only simplifying the starting and stopping of the engine, the removal of a designated stop only button from the handlebar reduces the risk of potential damage or activation in the event of a fall.

ELECTRIC START

Along with the benefit of the electric starting system, a lightweight Li-Ion 2.0 Ah battery is fitted to the FS 450. The Li-Ion battery weighs approx. 1 kg less than a conventional lead battery meaning the convenience of electric starting is delivered while keeping overall weight to a minimum.