2024 Husqvarna FX450 Guide • Total Motorcycle

Introducing the 2024 Husqvarna FX450…

Benefitting from new WP XACT Closed Cartridge spring front forks for 2024, the FX 450 retains its class-leading performance and continues to headline the Husqvarna Motorcycles offroad line-up. With an engine that not only produces a broad spread of usable power, but also positions the engine shaft arrangements at the ideal centre of gravity to centralise mass, the FX 450 offers a lightweight feel for all riders. Aiding this is the chassis which has been developed and manufactured using advanced engineering techniques to offer improved anti-squat behaviour for impeccable handling and manoeuvrability. Retaining its advanced electronics and high-quality components throughout, the FX 450 is complete with a flat profile seat, ergonomic bodywork, and finished with yellow and grey graphics inspired by the Swedish heritage of the brand.

CLASS-LEADING FC AND TC MOTOCROSS AND FX AND TX CROSS-COUNTRY MODELS ENHANCED WITH REVISED SUSPENSION AND STRIKING NEW LOOKS

Delivering the best in pure motocross and cross-country performance, Husqvarna Motorcycles’ 2024 lineup outperforms the competition. For the new model year, the five motocross and three cross-country machines are distinguished by a stunning, Swedish-inspired color scheme and high-grip seat covers and feature segment-specific suspension updates to further improve the benchmark-setting handling of each motorcycle. Every model is equipped with the latest technology and electronic advancements, which ensure all riders can race in confidence and to the best of their ability.

Setting a high standard for modern 2-stroke machines, the TC 125 and TC 250 motocross models are progressive in design and expertly assembled with the latest technology including Electronic Fuel Injection (EFI), which ensures class-leading power, rideability, enhanced reliability, and lower running costs. Complete with an electronic power valve and electric start, these are the machines of choice for all serious 2-stroke riders.

The 2024 FC 250 and FC 350 are powered by state-of-the-art DOHC 4-stroke engines that are lightweight, powerful, and play a vital role in enhancing the overall handling of each machine. Together with the iconic 450 cc FC 450, all 4-stroke machines feature the latest technology and electronic rider aids.

Every machine in the motocross lineup is engineered with one goal in mind – to outperform the competition. For the new model year, the FC and TC models are equipped with reworked WP suspension for superior comfort, handling, and straight-line stability. The WP XACT 48 mm front fork and WP XACT rear shock feature new settings for improved cornering agility, with customization and further fine tuning achieved by using the easy access, tool-free adjusters. Continuing to feature ProTaper handlebars, a Brembo clutch, and Dunlop tires, all TC and FC models are premium racing machines capable of competing at the highest level.

Built for the demands of off-road competition, the TX 300, FX 350, and FX 450 cross-country machines utilize the same advanced platforms as found on the TC and FC models and are enhanced by large capacity fuel tanks, cross-country specific gearing, convenient side stands, and a 21/18-inch D.I.D DirtStar wheelset fitted with Dunlop MX33 front and AT81 rear tires. Headlining the platform differences for 2024 is the all-new WP XACT closed cartridge spring fork offered on all cross-country models.

Rigorously tested by WP’s research and development department, the new 48 mm WP XACT closed cartridge spring fork provides exceptional comfort and consistency over long rides. This is achieved by the closed cartridge system and by using a mid-valve piston designed to optimize oil flow and prevent foaming for consistent and predictable damping at all times. A hydrostop, active in the final 68 mm of travel, reduces the impact of harsh and high-speed landings for continued straight line stability and forward momentum. Both the compression and rebound settings can be quickly adjusted by hand using the easy access clickers.

2024 Technical Highlights:

A competition-focused range of Technical Accessories and Apparel accompanies the release of the 2024 motocross and cross-country machines. For added durability, the Factory Racing Wheels are incredibly strong with the Factory Racing Triple Clamps offering improved suspension performance and enhanced front wheel feedback. Offering comfort, style, and protection, the Apparel Collection ensures riders of all abilities are fully prepared and protected for every ride.

Faster and wiser

Engine

The FX 450 engine benefits from advanced engineering techniques to deliver maximum performance. Low in weight and weighing just 59 lbs (26.8 kg), the engine is designed to centralise mass for enhanced handling and significantly improved anti-squat behaviour from the chassis. Servicing of the engine is made easier compared to previous models thanks to the addition of service markers on the engine cases.

Cylinder head

The redesigned SOHC cylinder head is incredibly compact with the camshaft positioned as close to the centre of gravity as possible for significantly improved handling and agility. A new, more durable fine punched cam chain runs on low-friction chain guides for optimal efficiency and improved 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 and 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. For improved performance, the compression ratio has been increased to 13.1:1 to create an incredible peak power while maintaining its crisp responsiveness.

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 450cc plant. A plain big end bearing comprising of two force-fitted bearing shells ensure maximum reliability and durability, guaranteeing long service intervals of 90 hours.

Crankcases

Designed for optimised mass centralisation, the FX 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.

DDS clutch

The FX 450 features a (DDS) Dampened Diaphragm Steel clutch, which includes a single-diaphragm steel pressure plate instead of traditional coil springs. It integrates a damping system for better traction and durability. The clutch basket is a single-piece CNC-machined steel component, which has been revised to accomodate the new gearbox in 2023, and continues to allow the use of thin steel liners that contribute to the compact design of the engine.

Gearbox

Produced by PANKL RACING SYSTEMS, the new 5-speed gearbox is designed to be extremely light and durable with a revised transmission ratio of 29:72 offering smooth and precise shifting. Integrated on the shift drum, a new quickshift sensor can be activated on the map select switch to further enhance clutchless upshifting.

Ride easier

Frame

The proven chromium molybdenum steel frame is refined for 2023 to reposition rotational masses inside the engine which together with a new shock mounting position, significantly improves anti-squat behaviour of the chassis. With optimised wall thickness in high-stress areas improving reliability, the frame continues to offer advanced geometries and flex characteristics aimed at providing unparalleled rider feedback, energy absorption, and exceptional straight-line stability. The frame is finished off in a premium metallic blue powder coating with redesigned standard frame protectors offering superior protection, durability, and grip in any condition. Additionally, the inclusion of forged brackets on the lower frame rails allows for easy installation of the standard skid plate.

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 3.9 lbs (1.8 kg). The lower subframe spars and frame mounts are manufactured from cast aluminium for significantly improved reliability. The upper section of the subframe is made from injection-moulded polyamide to enable specific flex characteristics and ensure a lightweight construction.

Triple clamps

Matching the new 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 new handlebar clamp which offers two mounting options – rubber-damped for less vibration or fixed for enhanced front-end feedback. The upper triple clamp is stiffer to ensure a smoother fork action and plays a vital role in the perfect alignment of the front wheel for superior handling.

WP XACT front suspension

Rigorously tested by WP’s research and development department, the new 48 mm WP XACT closed cartridge spring forks provide exceptional comfort and consistency over long rides. This is achieved by the closed cartridge system and by using a mid-valve piston designed to optimise oil flow and prevent foaming for consistent and predictable damping at all times. A hydrostop, active in the final 68 mm of travel, reduces the impact of harsh and high-speed landings for continued straight line stability and forward momentum. Both the compression and rebound settings can be quickly adjusted by hand using the easy access clickers.

WP XACT rear suspension

The all-new WP XACT rear shock is 100 g lighter and 15 mm shorter than its predecessor yet the travel remains unchanged. Inside the shock is a Computational Fluid Dynamics (CFD) optimised main piston for improved initial comfort which provides strong hold-up in all conditions. Different sized holes in the shims allow them to open more easily which reduces the overall stress of the oil flow. Complete with low friction SKF seals and a revised linkage system, consistent damping, comfort, and traction are guaranteed with rebound and both high and low speed compression now adjustable by hand.

Swingarm

The new hollow die-cast aluminium swingarm is manufactured from a single piece of aluminium using an improved die-cast production process for optimal stiffness and a 190 g weight reduction over previous versions. In order to optimise and match the flex characteristics from the new frame, a new 22 mm rear axle is fitted. Additionally, the chain guard and chain slider have been completely redesigned for improved durability and are less prone to catching on external objects.

Effortless ergonomics

Bodywork

Clean, Swedish-inspired design and ergonomics are tailored to deliver exceptional comfort and control, enabling riders to perform at their best for extended periods of time. Adapted after countless hours of testing, the contact points have been repositioned for 2023 and together with a flatter seat profile, riders can move freely on the motorcycle for total control at all times.

Tool-less airbox

Easy access to the TWIN AIR filter is possible without tools, for quicker cleaning and easier maintenance. Precision inlet ducts maximise airflow and offer increased levels of filter protection.

Hydraulic clutch

The high-performance hydraulic clutch system guarantees even wear, near maintenance-free operation and perfect modulation in every condition. Meaning 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, hydraulic systems’ exceptional reliability.

Hydraulic brakes

The highest level of quality is guaranteed with class-leading breaking callipers made from single pieces of aluminium for strength at the lowest possible weight. Together with a 260 mm front and a 220 mm rear disc removing dirt efficiently, superior stopping power and braking confidence is guaranteed in all conditions.* The illustrated vehicles may vary in selected details from country to country and feature either Braktec or Brembo hydraulic systems.

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. Fitted to the handlebar as standard are our open handguards for added protection in the demanding off-road environments.

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.

Effortless ergonomics

Footrests

All-new, CFD-designed footrests offer a 26.8% larger contact area to ensure better control of the machine while being less susceptible to hooking on deep ruts, take-offs when scrubbing, or trackside barriers. This was achieved by a new, narrower mounting design in the frame layout, which also helps reduce overall weight.

Master your art

Wheels and tyres

CNC-machined hubs and high-strength alloy rims by D.I.D are finished in striking black. They feature laser engraved logos and are fitted with a DUNLOP GEOMAX MX33 tyre on the front and DUNLOP GEOMAX AT81 tyre on the rear which ensure progressive cornering and superior traction on a variety of terrain.

Exhaust system

Tailored specifically to the FX 450 engine using an innovative 3D design process, the header pipe ensures maximum power across the rev range. The muffler features an aluminium mounting bracket for strength at the lowest possible weight, with an advanced internal construction ensuring excellent noise damping without sacrificing performance.

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 a new internal thermostat further enhances reliability.

Fuel tank

The 2.24 gal (8.5 litre) fuel tank integrates neatly with the ergonomic bodywork. Due to the fuel pump design and position, the tank is 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.

Technologically advanced

Map select switch

A redesigned and intuitive handlebar-mounted map select switch allows riders to activate launch and traction control, and allows riders to toggle between two engine maps. The easy-to-operate map select switch allows racers to quickly alter and set up the engine characteristics on a race by race basis dependent on track conditions and rider preference.

Quickshift

The new quickshift function can be activated or deactivated via the map select switch. The function works only when upshifting, interrupting the ignition for a fraction of a second. This allows upshifting while the throttle is fully open without the use of the clutch. A sensor on the shift drum registers the force from the shift lever, sends the signal to the ECU and the ignition timing is interrupted. To prevent unintended shifts and false neutrals, the function is only active from second gear upwards.

Mapping

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

E-Start

As with all 4-strokes in the Husqvarna range, the FX 450 starts with the ease of pressing a button thanks to electric start. A lightweight Li-Ion 2.0 Ah battery is fitted, giving the convenience of electric starting while keeping overall weight to a minimum.

Engine management system

The KEIHIN EMS is designed to be small, lightweight and fast at processing data. It integrates traction control for perfect starts, selectable engine maps via the switch on the handlebar, as well as launch control.

Hour meter

A new hour meter comes with an integrated fuel level indicator, which is visible on the FI status LED, indicating to the rider when the fuel level is becoming low.

Start/stop switch

The new 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.

Traction Control

Traction control on the FX 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 or muddy conditions.

ENGINETRANSMISSION 5-speedSTARTER Electric starterSTROKE 63.4 mmBORE 95 mmCLUTCH Wet, DDS multi-disc clutch, Brembo hydraulicsDISPLACEMENT 449.9 cm³EMS Keihin EMSDESIGN 1-cylinder, 4-stroke engine

CHASSISWEIGHT (WITHOUT FUEL) 105.5 kgTANK CAPACITY (APPROX.) 8.5 lFRONT BRAKE DISC DIAMETER 260 mmREAR BRAKE DISC DIAMETER 220 mmFRONT BRAKE Disc brakeREAR BRAKE Disc brakeCHAIN 520 X-RingFRAME DESIGN Central double-cradle-type 25CrMo4 steelFRONT SUSPENSION WP XACT-USD, Ø 48 mmGROUND CLEARANCE 343 mmREAR SUSPENSION WP XACT Monoshock with linkageSEAT HEIGHT 948 mmSTEERING HEAD ANGLE 63.9 °SUSPENSION TRAVEL (FRONT) 300 mmSUSPENSION TRAVEL (REAR) 300 mm

Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).