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2025 Husqvarna FC 450

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Specs and Features

ENGINE

TRANSMISSION

5-speed

BATTERY CAPACITY

2 Ah

COOLING

Liquid cooled

STARTER

Electric starter

STROKE

63.4 mm

BORE

95 mm

CLUTCH

Wet, DDS multi-disc clutch, Brembo hydraulics

COMPRESSION RATIO

13.6

DISPLACEMENT

449.9 cm³

EMS

Keihin EMS

DESIGN

1-cylinder, 4-stroke engine1-cylinder, 4-stroke engine

FUEL-MIXTURE GENERATION

Keihin EFI, throttle body 44 mm

CHASSIS

WEIGHT (WITHOUT FUEL)

102.8 kg

TANK CAPACITY (APPROX.)

7.2 l

WHEELBASE

1490 mm

FRONT BRAKE DISC DIAMETER

260 mm

REAR BRAKE DISC DIAMETER

220 mm

FRONT BRAKE

Disc brake

REAR BRAKE

Disc brake

CHAIN

520, Non-sealed

FRAME DESIGN

Central double-cradle-type 25CrMo4 steel

FRONT SUSPENSION

WP XACT-USD, Ø 48 mm

GROUND CLEARANCE

336 mm

HANDLEBAR

Pro Taper, Aluminium Ø 28/22 mm

REAR SUSPENSION

WP XACT Monoshock with linkage

SEAT HEIGHT

946 mm

SILENCER

Aluminium

STEERING HEAD ANGLE

63.9 °

REAR SUBFRAME DESIGN

Aluminum-reinforced polyamide

SUSPENSION TRAVEL (FRONT)

305 mm

SUSPENSION TRAVEL (REAR)

293 mm

WHEELS

Spoked wheels with aluminium rims

FC 450

The FC 450 continues to be the flagship machine in the Husqvarna Motorcycles motocross line-up. Its class-leading performance is retained for 2025 thanks to a new chromium molybdenum frame that is lighter, perfectly balanced, and improves agility without sacrificing straight-line stability. Further upgrades include new, race-tested Dunlop Geomax MX34 tyres and ergonomic bodywork that features new, Swedish-inspired graphics that are applied using in-mold technology for a long-lasting, striking finish.

Powerful engine

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

Cylinder head

The SOHC cylinder head is incredibly compact with the camshaft positioned as close to the centre of gravity as possible for unrivalled 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 ensuring 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. Delivering best-in-class performance, the compression ratio is 13.6:1 for incredible peak power and ensures the FC 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, which creates 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, guaranteeing long service intervals of 90 hours.

Crankcases

Designed for optimised mass centralisation, the FC 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 FC 450 features a dampened diaphragm steel (DDS) clutch that 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 using thin steel liners, which ensures a compact overall engine design.

Gearbox

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

2025 Husqvarna FC 450

Specs and Features

FC 450

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