Husqvarna FC450

Overview
The FC 450 serves as the flagship of Husqvarna’s motocross lineup, delivering class-leading performance with a combination of a perfectly balanced chromium-molybdenum chassis and a state-of-the-art engine. Equipped with race-tested components like Dunlop Geomax MX34 tyres, ProTaper handlebars, and WP suspension, it offers the fastest way around any circuit.

Faster and Wiser
Powerful Engine: A lightweight engine weighing just 59 lb (26.8 kg) precisely centralizes mass for enhanced handling and improved anti-squat characteristics. Service markers make maintenance easier.

• Cylinder Head: Compact SOHC layout with the camshaft positioned as close to the center of gravity as possible. It includes a fine-punched cam chain on low-friction guides and a single oil spray jet for efficient cooling.
• Cylinder & Piston: Features a 95 mm bore, 63.4 mm stroke aluminum cylinder with a CP bridged-box piston (327 g) and a 13.6:1 compression ratio for peak power and endurance.
• Crankshaft: Carefully positioned to optimize rotating mass for traction and rideability, using a plain big-end bearing with two force-fitted shells for durability and 90-hour service intervals.
• Crankcases: Die-cast for optimized mass centralization, boasting a thin yet strong wall design.
• DDS Clutch: Utilizes a dampened diaphragm steel clutch, replacing coil springs with a single steel pressure plate inside a compact CNC-machined steel basket.
• Gearbox: A lightweight, durable 5-speed gearbox from Pankl Racing Systems, featuring motocross-specific ratios (29:72) and an integrated Quickshifter via the Map Select Switch.

Ride Easier

• Lightweight Frame: A chromium-molybdenum chassis with optimized material distribution enhances cornering stability and confidence. Finished in metallic blue powder coating with frame protectors for durability and grip.
• Subframe: Made from 60% polyamide and 40% aluminum; two-piece design weighs just 1.8 kg and balances strength with weight.
• CNC Triple Clamps: Offer precisely tuned geometry and handlebar alignment, with options for vibration damping or fixed mounting.
• WP XACT Front Suspension: 48 mm closed-cartridge forks with mid-valve damping and a hydrostop feature ensure smooth control on harsh landings, with easy adjustments.
• WP XACT Rear Shock: CFD-optimized main piston for superior comfort, with hand-adjustable rebound and compression.
• Swingarm: Die-cast, rigid design with a 22 mm rear axle and integrated chain slider to maintain momentum through tough sections.

Effortless Ergonomics

• Functional Bodywork: Designed for comfortable rider control with smooth contact points and in-mold graphics. Tall, wide seat and high-grip cover minimize fatigue and maintain rider positioning.
• Airbox: One-piece design ensures deformation-resistant airflow and tool-free access to the Twin Air filter.
• Hydraulic Clutch: A Brembo hydraulic system ensures minimal maintenance, consistent pressure point, and reliability in all conditions.
• Hydraulic Brakes: High-performance Brembo calipers with 260 mm front and 220 mm rear discs resist mud buildup and deliver trusted stopping power.
• ProTaper Handlebars & ODI Grips: Ergonomic, lightweight, and durable handlebar configuration with lock-on grips for personalized throttle response.
• Footrests: CFD-engineered wide design for better control and reduced ruts or barrier snagging.

Master Your Art

• Wheels & Tyres: D.I.D alloy rims with CNC hubs and spokes matched to Dunlop MX34 tyres for precision cornering and traction.
• Exhaust System: Compact two-piece header with a resonance chamber and short silencer improves performance and keeps mass centralized—removable without taking off the rear shock.
• Cooling System: CFD-optimized aluminum radiators with a central frame tube for coolant pressure consistency and easy inspection via a threaded cap.
• Fuel Tank: A 7.2 l fuel tank is cushioned on rubber and integrates cleanly with bodywork, featuring protected routing and a cap that guards the fuel filter.

Technologically Advanced

• Map Select Switch: Handlebar-mounted switch to toggle engine maps, Quickshifter, Launch Control, and Traction Control on-the-fly.
• Quickshifter: Enables clutchless upshifts via ignition interruption from the shift drum signal; active from second gear up.
• Traction Control: Detects rapid RPM increases, reducing power to maximize rear-wheel grip in low traction conditions.
• Launch Control: Activated by pressing TC and Quickshifter buttons simultaneously to limit wheelspin until a gear change occurs.
• Engine Maps: Two maps are standard—Map 1 offers linear throttle, while Map 2 delivers a sharper, more aggressive response.
• EMS with Rollover Sensor: Fast, compact engine management system includes an ROS to shut off the engine in severe crashes.
• Hour Meter with Fuel Indicator: Displays operating hours and fuel status via LED FI warning.
• Start/Stop Switch: Integrated switch replaces a dedicated stop button, minimizing damage risks in the event of a fall.
• Electric Start: Features a lightweight Li-Ion 2.0 Ah battery (~1 kg lighter than traditional), delivering the convenience of electric starting without added weight.