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2021 Husqvarna FX 450
2021 Husqvarna FX 450

Specs

General Information

Manufacturer
Husqvarna
Husqvarna
Model Year
2021
2021
Model
FX 450
FX 450
Model Code
FX450
FX450
Color
White / Yellow / Blue
White / Yellow / Blue

Brakes/Wheels/Tires

Brakes

Front - 260 mm Disc

Rear - 220 mm Disc

Front - 260 mm Disc

Rear - 220 mm Disc

Dimensions

Weight
Without fuel - 223.3 lb. (101.3 kg)
Without fuel - 223.3 lb. (101.3 kg)
Ground Clearance
14.6 in. (370 mm)
14.6 in. (370 mm)
Seat Height
37.4 in. (950 mm)
37.4 in. (950 mm)

Drivetrain

Transmission
5-speed
5-speed
Chain
5/8 x 1/4 in.
5/8 x 1/4 in.

Engine

Engine
4-stroke
4-stroke
Cylinders
Single
Single
Displacement
449.9 cc
449.9 cc
Bore x Stroke
95 x 63.4 mm
95 x 63.4 mm
Clutch
Wet, DDS multi-disc, Magura hydraulics
Wet, DDS multi-disc, Magura hydraulics
Fuel System
Keihin EMS
Keihin EMS
Starting
Electric
Electric
Fuel Capacity
Approx. - 2.25 gal. (8.5 l)
Approx. - 2.25 gal. (8.5 l)

Operational

Frame
Central double-cradle-type 25CrMo4 steel
Central double-cradle-type 25CrMo4 steel
Front Suspension

WP XACT-USD, Ø 48 mm

Travel - 310 mm

WP XACT-USD, Ø 48 mm

Travel - 310 mm

Rear Suspension

WP XACT Monoshock with linkage

Travel - 300 mm

WP XACT Monoshock with linkage

Travel - 300 mm

Rake
63.9°
63.9°

Features

Components

  • 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 100 hours.
  • CNC MACHINED TRIPLE CLAMPS: The 22 mm offset CNC-machined triple clamps feature an integrated rubber damping system that reduces vibration and increases rider comfort. The triple clamp works in harmony with the front forks, offering superior handling and stability. Additionally, the front number board integrates a triple clamp roost protector.
  • MAGURA HYDRAULIC CLUTCH: The reliable, high quality, German-made 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 hot or cold conditions, as well as over time.
  • DDS CLUTCH: The FX 450 features a 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 that allows the use of thin steel liners and contributes to the compact design of the engine.

Control

  • FUNCTIONAL BODYWORK: Clean, Swedish-inspired design and ergonomics are tailored to deliver exceptional comfort and control, enabling riders to perform at the highest level for extended periods of time. As a result of extensive testing, the slim contact points make shifting between riding positions easier and allow the rider to flow with movement. The flat seat profile, together with the seat cover texture, deliver superior comfort and control in all conditions.
  • WP XACT FRONT FORK: The 48 mm split air fork features a capsulated air spring and pressurized oil chamber for progressive and consistent damping. Pressure peaks were reduced through extended oil and air bypasses. In combination with a new midvalve damping system, the fork provides exceptional feedback and rider comfort. The setting is easily adjusted via the single air pressure pre-load valve, as well as through 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 REAR SHOCK: With updated settings, 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 feeling. The fully adjustable component delivers 300 mm rear wheel travel, as well as unrivalled traction, feeling and energy absorption.
  • WHEELS AND TYRES: Made from high-strength alloy rims by D.I.D and featuring CNC-machined hubs, the wheels of the FX 450 are fitted with DUNLOP GEOMAX tyres with proven design for progressive cornering and superior grip on a variety of terrain.

Electronics

  • MAP SWITCH: Designed for easy, one-finger operation, the map switch is standard on the FX 450 and serves multiple functions. It allows the riders to easily select between 2 engine maps, activate the launch control or toggle the traction control feature.
  • ENGINE MANAGEMENT SYSTEM: The KEIHIN EMS is designed to be small, lightweight and fast at processing data. It integrates launch control for perfect starts, selectable engine maps via the switch on the handlebar as well as traction control.
  • 44 MM THROTTLE BODY: The FX 450 features a 44mm Keihin throttle body. The injector is positioned to ensure the most efficient flow into the combustion chamber while to ensure optimal throttle response the throttle cable is mounted directly without a throttle linkage providing more immediate throttle response and feeling.
  • ELECTRIC START AND LI-ION BATTERY: Along with the benefit of an easy electric starting system, a lightweight Li-Ion 2.0 Ah battery is fitted to the FX 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.

Performance

  • POWERFUL ENGINE: The SOHC engine is the perfect example of the advanced engineering techniques used by Husqvarna motorcycles offering class-leading HP at an overall weight of just 61.3 pounds. Mass-centralization is key in the engine design, enabling chassis engineers to position the engine closer to the center of gravity for optimal handling and maneuverability.
  • GEARBOX: A lightweight 5-speed gearbox produced by PANKL Racing Systems ensures the highest level of durability and reliability. The gear lever also features a unique design that prevents dirt build-up and keeps the lever tip in its original position, even in the toughest conditions, while an advanced gear sensor selects the ideal engine map for each gear.
  • LIGHTWEIGHT FRAME: The chromium molybdenum steel frame is expertly crafted using laser-cut, robot-welded, hydro-formed tubes, ensuring the highest level of precision and quality. The specifically crafted geometry utilises advanced longitudinal and torsional flex characteristics, for unparalleled rider feedback, energy absorption and exceptional straight-line stability. The frame is finished off in a premium blue powder coating with standard frame protectors for superior protection and durability.
  • COMPOSITE CARBON FIBRE SUBFRAME: The carbon composite subframe is unique to Husqvarna Motorcycles and showcases advanced production technology and innovation. Using 70% polyamide and 30% carbon fibre, the 2-piece subframe has a total weight of just over 1 kg. With the help of computational dynamics, specific rigidity was engineered into the light and robust subframe, delivering outstanding handling and rider comfort.

Components

  • 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 100 hours.
  • CNC MACHINED TRIPLE CLAMPS: The 22 mm offset CNC-machined triple clamps feature an integrated rubber damping system that reduces vibration and increases rider comfort. The triple clamp works in harmony with the front forks, offering superior handling and stability. Additionally, the front number board integrates a triple clamp roost protector.
  • MAGURA HYDRAULIC CLUTCH: The reliable, high quality, German-made 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 hot or cold conditions, as well as over time.
  • DDS CLUTCH: The FX 450 features a 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 that allows the use of thin steel liners and contributes to the compact design of the engine.

Control

  • FUNCTIONAL BODYWORK: Clean, Swedish-inspired design and ergonomics are tailored to deliver exceptional comfort and control, enabling riders to perform at the highest level for extended periods of time. As a result of extensive testing, the slim contact points make shifting between riding positions easier and allow the rider to flow with movement. The flat seat profile, together with the seat cover texture, deliver superior comfort and control in all conditions.
  • WP XACT FRONT FORK: The 48 mm split air fork features a capsulated air spring and pressurized oil chamber for progressive and consistent damping. Pressure peaks were reduced through extended oil and air bypasses. In combination with a new midvalve damping system, the fork provides exceptional feedback and rider comfort. The setting is easily adjusted via the single air pressure pre-load valve, as well as through 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 REAR SHOCK: With updated settings, 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 feeling. The fully adjustable component delivers 300 mm rear wheel travel, as well as unrivalled traction, feeling and energy absorption.
  • WHEELS AND TYRES: Made from high-strength alloy rims by D.I.D and featuring CNC-machined hubs, the wheels of the FX 450 are fitted with DUNLOP GEOMAX tyres with proven design for progressive cornering and superior grip on a variety of terrain.

Electronics

  • MAP SWITCH: Designed for easy, one-finger operation, the map switch is standard on the FX 450 and serves multiple functions. It allows the riders to easily select between 2 engine maps, activate the launch control or toggle the traction control feature.
  • ENGINE MANAGEMENT SYSTEM: The KEIHIN EMS is designed to be small, lightweight and fast at processing data. It integrates launch control for perfect starts, selectable engine maps via the switch on the handlebar as well as traction control.
  • 44 MM THROTTLE BODY: The FX 450 features a 44mm Keihin throttle body. The injector is positioned to ensure the most efficient flow into the combustion chamber while to ensure optimal throttle response the throttle cable is mounted directly without a throttle linkage providing more immediate throttle response and feeling.
  • ELECTRIC START AND LI-ION BATTERY: Along with the benefit of an easy electric starting system, a lightweight Li-Ion 2.0 Ah battery is fitted to the FX 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.

Performance

  • POWERFUL ENGINE: The SOHC engine is the perfect example of the advanced engineering techniques used by Husqvarna motorcycles offering class-leading HP at an overall weight of just 61.3 pounds. Mass-centralization is key in the engine design, enabling chassis engineers to position the engine closer to the center of gravity for optimal handling and maneuverability.
  • GEARBOX: A lightweight 5-speed gearbox produced by PANKL Racing Systems ensures the highest level of durability and reliability. The gear lever also features a unique design that prevents dirt build-up and keeps the lever tip in its original position, even in the toughest conditions, while an advanced gear sensor selects the ideal engine map for each gear.
  • LIGHTWEIGHT FRAME: The chromium molybdenum steel frame is expertly crafted using laser-cut, robot-welded, hydro-formed tubes, ensuring the highest level of precision and quality. The specifically crafted geometry utilises advanced longitudinal and torsional flex characteristics, for unparalleled rider feedback, energy absorption and exceptional straight-line stability. The frame is finished off in a premium blue powder coating with standard frame protectors for superior protection and durability.
  • COMPOSITE CARBON FIBRE SUBFRAME: The carbon composite subframe is unique to Husqvarna Motorcycles and showcases advanced production technology and innovation. Using 70% polyamide and 30% carbon fibre, the 2-piece subframe has a total weight of just over 1 kg. With the help of computational dynamics, specific rigidity was engineered into the light and robust subframe, delivering outstanding handling and rider comfort.