• FC 250 Rockstar Edition | FC 450 Rockstar Edition 2022

    Media Information

  • Introduction

    FC 250 Rockstar Edition | FC 450 Rockstar Edition

    Husqvarna Motorcycles introduces the 2022 FC 250 Rockstar Edition and FC 450 Rockstar Edition models. All-new engines and chassis keep competitive motocross riders ahead of the competition, race after race. Class-leading, dynamic performance delivers instant power, while advanced ergonomics provide complete control.

    Both engines are all-new, lightweight and are repositioned in their frames for optimal mass-centralisation, guaranteeing easy handling and control. For 2022, the FC 250 Rockstar Edition and FC 450 Rockstar Edition come with a completely revised chassis, featuring a new hydro-formed chromium molybdenum frame designed for improved anti-squat behaviour under power. A new die-cast aluminium swingarm provides optimal rigidity with low weight. A durable, aluminium-polyamide hybrid subframe is designed for specifically calculated rigidity.

    Top-level suspension is provided by WP. New XACT 48 mm front forks with AER technology deliver more progressive damping at the end of their stroke, while the latest XACT rear shock design features tool-free adjustment.

    A new, multifunctional map switch selects power delivery modes. It also activates traction and launch control features, as well as engaging Easy Shift for seamless upshifts of the revised-ratio five-speed gearboxes in both the FC 250 Rockstar Edition and FC 450 Rockstar Edition.

    New bodywork, adorned with the latest Rockstar Energy Husqvarna Factory Racing graphics, has tailored ergonomics for ease of movement on the motorcycle. This gives riders greater control to focus on racing.

    Technical Highlights

    Model year 2022

    • New bodywork with specifically tailored ergonomics for easier movement on the motorcycle
    • New hydro-formed chromium molybdenum frame significantly improving anti-squat behaviour
    • New topology-optimised die-cast aluminium swingarm providing optimal rigidity and low weight
    • New 250cc DOHC engine providing class-leading torque and peak power
    • New 450cc SOHC engine providing class-leading performance and low weight
    • New Easy Shift sensor providing seamless up-shifting
    • High-performance Brembo hydraulic clutch system
    • New aluminium-polyamide hybrid subframe construction providing specifically calculated rigidity and advanced durability
    • New WP XACT 48 mm front forks with AER technology offer more progressive end-of-stroke damping
    • New WP XACT rear shock design with CFD-optimised main piston and tool-free adjusters
    • New multifunctional map switch, which also activates the Easy Shift, Traction- and Launch Control
    • New Rockstar Energy Husqvarna Factory Racing graphics
    • Factory Racing CNC-machined triple clamps with adjustable offset [20 – 22 mm]
    • Factory wheel set with D.I.D DirtStar rims and black anodised CNC-machined hubs
    • New polyamide composite skid plate for advanced protection and durability
    • New polyamide composite front brake disc guard for added protection
    • Mechanical Factory holeshot device as standard
    • Soft, grey ODI lock-on grips
    • GUTS Factory high-grip seat cover
    • Premium-quality ProTaper handlebar and bar pad
    • Electric starter powered by a lightweight Li-Ion 2.0 Ah battery

    Features and benefits

    Frame

    The hydro-formed, laser-cut and robot-welded frame is expertly crafted. Constructed with specifically calculated parameters of longitudinal and torsional flex, the frame provides exceptional rider feedback, energy absorption and straight-line stability. Additionally, the frame features forged brackets for mounting the newly designed polyamide skid plate fitted as standard on the Rockstar Editions.

    Rotational masses in the frame and the forged steering head connection have been repositioned. Together with the new shock mounting, which is no longer connected to the main tube, the anti-squat of the chassis has been significantly improved. Also, the wall thickness of the frame has been optimised to achieve improved reliability and specific rigidity in high stress areas such as the steering head and the shock mounts. Parallel frame mounts (same position on left and right sides) improve chassis flex characteristics, while stability characteristics remain unrivalled.

    Another highlight of the new frame topology is that the footrest mounting positions have been moved inwards, resulting in less susceptibility to hooking in deep ruts or when scrubbing jumps. The overall size of the all-new footrests has been increased, designed with the help of state-of-the-art computational fluid dynamics (CFD). The new one-piece steering head seal allows easier mounting in case of replacement or service and offers improved reliability.

    The frame of the Rockstar Editions is finished off in a premium black fine-structured powder coating. The standard frame protectors feature a new and improved topology, guaranteeing superior protection, durability, and advanced grip in any condition. Mounted with four screws, using the integral frame brackets, the newly designed polyamide composite skid plate offers superior protection against dirt and hard impacts on the frame and engine.

    • Specifically engineered longitudinal rigidity → exceptional rider feedback, energy absorption and stability
    • Repositioned rotational masses and new shock mounting → significantly improved anti-squat of chassis
    • Topology-optimised frame wall thickness for specific rigidity and improved reliability in high-stress areas (e.g., steering head, shock mount)
    • New parallel frame mounts (same position on left and right side) for improved flex characteristics
    • Footrest mounting position moved inwards for reduced risk of hooking in deep ruts or when scrubbing
    • New, service friendly one-piece steering head seal → easier mounting, improved reliability
    • Durable powder coated finish with standard frame protectors and composite skid plate

    Polyamide-reinforced aluminium subframe

    Using 60% polyamide and 40% aluminium, the two-piece subframe has a total weight of just 1.8 kg. With the help of computational dynamics, specific rigidity was engineered into the light and robust subframe, delivering outstanding handling and rider comfort.

    The lower subframe spars and frame mounts are made from cast aluminium profiles to guarantee robustness and reliability where needed. The upper subframe is made from injection-moulded polyamide, enabling specific flex characteristics and allowing a lightweight construction.

    • New topology-optimised polyamide/aluminium hybrid construction
    • Lower subframe spars and frame mounts made from (cast) aluminium profiles → extremely robust and reliable (no weld joints)
    • Upper subframe made from injection-moulded polyamide → specific rigidity and flex benefit handling and comfort

    Swingarm

    The new hollow die-cast aluminium swingarm is designed to offer optimal stiffness and reliability at the lowest possible weight. The topology has been optimised for optimal rigidity, while an improved casting process reduces weight by approximately 190 g. In order to optimise and match the new chassis flex characteristics, a new 22 mm rear axle is fitted.

    Additionally, the chain guard and chain slider have been completely redesigned, resulting in improved durability and less susceptibility to hooking on external objects. This new design will help reduce dirt build up around the swingarm and chain guard, especially in extreme muddy conditions.

    Chain adjustment markings are also visible from above to make for simpler adjustment.

    • New die-cast swingarm → topology-optimised for optimal rigidity
    • Improved casting process for reduced weight → 190 g less than previous generation
    • New 22mm rear axle optimised to match chassis flex characteristics
    • Newly designed chain guard and chain slider
    • Transitions aligned with swingarm surface, spring-steel mounted for improved durability
    • Overall, less susceptible to hooking on external objects

    WP XACT front fork with AER technology

    The 48 mm split air fork features a capsulated air spring and pressurised oil chamber for progressive and consistent damping. Oil and air bypasses reduce pressure peaks and, in combination with a midvalve damping system, the fork provides exceptional feedback and rider comfort. A new hydrostop improves bottoming resistance through more progressive damping force in the last 40 mm of travel. Additionally, rebound is also reduced leading to the fork being lower on initial acceleration after a hard landing. A redesigned fork protection ring increases protection against dirt intrusion.

    Settings are easily adjusted via a single air-pressure preload valve, as well as via easy access click adjusters for compression and rebound. Additionally, the air pump needed to adjust the fork's air pressure is provided as standard.

    • WP XACT front fork → 48 mm air type with split damping function
    • Midvalve damping system → exceptional damping and consistent performance
    • Capsulated air spring and pressurized oil chamber → progressive and consistent damping
    • New hydrostop in fork legs → improved bottoming resistance and reduced rebound
    • More progressive damping in last 40 mm of travel (total 310 mm) → previous generation hydrostop was only effective in last 10 mm of travel
    • Reduced rebound → fork stays lower on initial acceleration after hard landing
    • Easy access clicker dials → simple and fast clicker settings
    • Redesigned fork protection rings → increased protection against dirt intrusion

    CNC-machined triple clamps

    Made from high-grade aluminium, the CNC-machined Factory Racing triple clamps feature optimally tuned steering stem stiffness, perfect alignment of the fork tubes and precise geometry of the fork clamps to ensure highly responsive and smooth fork action. Maximum gains in handling are provided by simple offset adjustment of 20 mm or 22 mm.

    Newly designed, topology-optimised handlebar mounts provide increased grip surface for less handlebar twist at the same weight as the previous generation. Additionally, they allow for both rubber-damped and fixed mounting providing customisable handlebar flex.

    • Rubber-damped → less vibration, less precise front-end feel (OE)
    • Fixed → increased vibration, more precise front-end feel

    The front number plate integrates a triple clamp protector which covers the lower triple clamp and protects it from wear caused by roost.

    • CNC-machined aluminium with anodised surface → finest quality and reliability
    • Perfect clamping and alignment → smooth fork action
    • New, topology-optimised handlebar mounts → increased grip surface for less handlebar twist, same weight as previous generation
    • Rubber damping on top clamp → reduced vibration, increased comfort
    • Adjustable handlebar position → adjustable ergonomics

    WP XACT rear shock

    An all-new design results in a rear shock with 15 mm less overall length and 100 g less weight compared to the previous generation, while keeping the rear wheel travel unchanged at 300 mm. The shock is matched to a revised linkage system with a new geometry to deliver the same progression as before but with the greatest possible traction and absorption. Combined with the new frame geometry, it improves the ground clearance of the linkage and is therefore less susceptible to damage when bottoming out.

    The new, computational fluid dynamics (CFD) optimised main piston in the shock improves initial comfort and provides strong hold-up. Differently sized flow holes allow the shims to open more easily and reduce the overall stress of oil flow and pressure on the shims. Reduced weight also means less moving mass, resulting in lower forces on the main piston.

    A fully hand-adjustable dual compression control concept allows high- and low-speed settings to be changed by hand. Together with the newly designed rebound adjuster, which is hand or tool adjustable, riders are now able to adjust their shock settings without tools and without the help of a mechanic at the racetrack.

    On top of the tool-free setting adjustment possibilities, a new preload adjuster is introduced bringing increased resistance to dirt intrusion. A new two-piece spring retainer allows for quick mounting without splitting the shock.

    With its low-friction SKF linkage seals, the WP XACT rear shock provides advanced damping characteristics for unsurpassed traction and energy absorption. A pressure balance inside the shock ensures consistent damping, resulting in superior rider comfort and feel.

    • New lightweight, compact rear shock design with 15 mm reduced overall length
    • MY21 → 470 mm / MY22 → 455mm | rear wheel travel unchanged → 300 mm
    • Reduced weight results in less moving mass → 100 g lighter design results in lower forces on bearings
    • New CFD-optimised main piston increases initial comfort and guarantees strong hold-up
    • Improved ground clearance, lower risk of damage in extreme bottoming-out situations
    • New dual compression control allows high- and low-speed settings to be adjusted by hand
    • New rebound adjuster allows changing setting by hand or tool
    • Reworked preload adjuster with increased dirt intrusion resistance and quick mounting concept
    • Low-friction SKF linkage seals → refined rear shock response for advanced damping characteristics
    • Pressure balance inside the shock body → consistent damping
    • Two-piece spring retainer allows for quick mounting and assembly of preload adjuster and shock

    Brembo hydraulic clutch

    The high-performance Brembo hydraulic clutch system guarantees even wear, near maintenance-free operation and perfect modulation in every condition. It 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 exceptional reliability of the high-quality, Italian-made Brembo hydraulic system.

    • Brembo hydraulic clutch system → perfect modulation and outstanding reliability in every condition

    Brakes

    The highest level of quality is guaranteed with class-leading Brembo calipers and controls. The 260 mm floating front and 220 mm wave rear discs deliver superior stopping power, instilling confidence in all conditions. A new polyamide composite front disc protector is fitted as standard for added protection.

    • Brembo brake calipers and high-performance discs → superior stopping power with greater control and confidence
    • New polyamide composite front disc protector → added protection and minimal weight

    ProTaper handlebar

    The ProTaper handlebar is second to none for function and style. Manufactured to exacting standards, the handlebar features class-leading fatigue resistance at a minimal weight. The handlebar bend further increases comfort with an optimal pressure point on the rider’s hands.

    • ProTaper handlebar → class-leading function and style
    • Husqvarna bend → optimal comfort

    Grips and throttle assembly

    The ODI lock-on grip on the left side does not require gluing, while on the right, the vulcanised grip features an innovative integrated throttle mechanism. The assembly has easy free-play adjustment and, by changing a cam, throttle progression can be altered. The ODI lock-on grips come standard in a softer, grey compound on the Rockstar Editions.

    • Throttle assembly and ODI grips → easily alter throttle progression; easy grip mounting without glue

    Footrests

    The all-new, CFD designed footrests offer a bigger surface for boot soles while being less susceptible to hooking on deep ruts, take-offs when scrubbing or track barriers. The result is better control of the bike in all conditions. This was achieved by a new, narrower mounting concept integrated in the frame design which also reduces weight.

    • New, topology-optimised, die-cast footrests → reduced weight and less susceptible to dirt build-up
    • Footrest mount integrated in frame → narrower profile is less susceptible to hook on deep ruts

    Map select switch, traction and launch control

    Designed for easy and intuitive operation, the new map select switch comes as standard on the Rockstar Edition. It activates traction and launch control, selects between two engine maps (aggressive/smooth) and activates the Easy Shift feature. Map 1 is the standard map for linear, predictable power, while Map 2 is an aggressive map for added throttle response and more explosive power output.

    The new Easy Shift function (upwards only) 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 opened without the use of the clutch lever. 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 to fifth gears.

    With the engine at idle, launch control is engaged by pressing the traction control and Easy Shift switch simultaneously. Both symbols will start flashing to indicate the 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 the rider shifts up a gear, the launch control will deactivate automatically. Additionally, the Easy Shift function is deactivated while launch control mode is engaged.

    Traction control is engaged by a switch marked ‘TC’ 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 ensuring maximum traction. This is a distinct advantage in wet or muddy conditions.

    • Newly designed handlebar map select switch → alters engine characteristics according to conditions and rider preference
    • New Easy Shift function → clutch-free upshifting
    • Traction control → optimal traction in all conditions
    • Launch control → maximum traction for perfect starts

    44 mm throttle body

    The Rockstar Edition models feature a 44 mm Keihin throttle body. The injector is positioned to ensure the most efficient flow into the combustion chamber, and to ensure optimal throttle response the throttle cable is mounted directly without a linkage providing more immediate throttle response and feel.

    • Throttle body → 44 mm, injector positioned for optimal flow, more immediate throttle response thanks to direct cable mounting

    Engine management system (EMS)

    The Keihin EMS is specifically designed to be smaller, lighter and faster at processing data. It integrates launch control for perfect starts, selectable engine maps via the traction control switch on the handlebar as well as the Easy Shift function. Combined with the gear sensor, power delivery is tailored for each gear.

    A new rollover sensor (ROS) cuts the ignition in case of extreme crashes, adding another level of safety to the new generation of Husqvarna motocross machines. Additionally, the new hour meter now comes with an integrated FI status LED and a fuel level indicator.

    • Keihin EMS → small, light and faster at processing engine data for more efficient engine management
    • New rollover sensor (ROS) → automatic cutting of ignition in extreme crashes
    • New hour meter with integrated FI status LED and fuel level indicator
    • Gear sensor → specific engine maps for each gear

    Exhaust system

    The Rockstar Edition exhaust systems are expertly designed to deliver leading performance for the least possible weight. The header pipe features a flow-designed resonance chamber integrated into the header pipe. The header pipe is designed and manufactured in two pieces to be as compact as possible. The position of the join allows it to be removed without having to remove the rear shock. Further innovation allows for a short, compact silencer without increased noise levels. The silencer is crafted from lightweight aluminium and is stylishly finished in a black coating that highlights its premium quality.

    • Compact exhausts → lightweight and engineered for optimal performance
    • Header pipe mounted directly onto engine mount for improved serviceability
    • Header join position → removal of exhaust without removing rear shock

    Electric start and Li-Ion battery

    To deliver the benefit of an easy electric starting system, a Li-Ion 2.0 Ah battery is fitted to the Rockstar Edition models. The Li-Ion battery weighs approximately 1 kg less than a conventional lead/acid battery, so the convenience of electric starting is delivered while minimising overall weight.

    • Electric starter → easy starting when time is critical
    • Li-Ion battery → lightweight, 1 kg lighter than a conventional battery

    Integrated cooling system and radiators

    The radiators are expertly crafted by WP using high-strength aluminium. CFD optimisation is used to channel air through the radiators more efficiently and provide optimal cooling in any condition. The cooling system is integrated into the frame allowing for improved cooling by channelling coolant through the frame while eliminating the need for additional hoses. A large centre tube running through the frame reduces the pressure at this point in the system allowing for a more consistent coolant flow and now includes an internal thermostat for added reliability.

    Additionally, the radiators are mounted close to the centre of gravity for improved handling agility.

    • Integrated cooling → maximum efficiency in minimum space
    • New bayonet closure radiator caps
    • WP radiators → efficient for optimal cooling
    • Large central tube → consistent coolant flow

    Airbox and tool-less Twin Air filter access

    The CFD optimised airbox is designed with precisely positioned inlet ducts to prevent air deformation and ensure maximum airflow and filter protection. The air filter is easily accessed, without tools, by removing the left side panel. Easy maintenance is guaranteed by the Twin Air filter element and filter cage design, featuring a simple fail-proof mounting system for safe and accurate filter installation.

    • CFD optimised airbox → improved air flow and maximised filter protection
    • Intuitive filter mounting system → safe and accurate protection against dirt
    • Tool-less filter access → quick and easy maintenance
    • High-flow airbox cover in the enclosed package → added customisability of the engine response

    Factory wheel set

    Black high-strength anodised DirtStar rims by D.I.D are laced to high quality black anodised CNC-machined hubs, using lightweight spokes and black anodised aluminium nipples to offer maximum weight savings and optimised handling and stability in the most extreme motocross conditions.

    • Lightweight but strong and reliable construction → minimal unsprung weight

    Tyres

    Dunlop GEOMAX MX33 Motocross tyres featuring the proven ‘block-within-a-block’ design for more progressive cornering and superior grip are fitted as standard.

    • Developed in top-level AMA Supercross and Motocross → enhanced handling, cornering and steering feel
    • Wide range of application including sand, mud, loose surface, and hard pack
    • Increased durability and crack resistance through an innovative rubber compound

    Bodywork

    The Rockstar Edition models feature bodywork which clearly showcases Husqvarna Motorcycles progressive approach to off-road motorcycles and striking black-and-white graphics stylishly adorn the Swedish-inspired design.

    An improved rider triangle for better knee contact, especially when riding in the standing position, inspires confidence for riders of every ability and enables them to perform at the highest level for extended periods of time. The slim contact surfaces on the bodywork allow the rider to more easily move the bike around on track, and improve the overall handling and agility of the bike.

    The flat seat profile, combined with the race engineered GUTS high-grip seat cover, deliver superior control in all conditions. A recessed pocket under the seat, just above the airbox, allows gripping and lifting of the bike.

    The graphics of the all-new Rockstar Editions closely resemble the look of Husqvarna’s Factory race bikes for the 2022 season. Sponsor logos and graphic design elements are implemented using durable in-mould technology. A high-quality factory race look is guaranteed, even after hours of intense riding.

    • Progressive bodywork → distinctive looks, modern design and graphics
    •  Improved rider triangle for better knee contact, especially when riding in the standing position
    • Additional contact surface → allows for improved gripping and easier movement of the bike
    • Recessed grip pockets → allowing better grip to lift the bike
    • Seat → flat seat profile and high-grip Factory seat cover for exceptional comfort and control in all conditions

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