- The WP Xact fork has been upgraded. There is new mid-valve damping inside the inverted 48mm fork. According to Husqvarna, that smooths out fork action.
- There are new linkage seals for the shock linkage. Like the fork mod, this upgrade has the goal of smoothing out the suspension action.

- The front axle is now 22mm, which reduces unsprung weight. Less unsprung weight is a plus for suspension operation.
- With the front suspension updates and new linkage seals, the WP Xact shock gets new settings to match. Husqvarna tells us the new shock settings were made to increase traction.

- Handling on the 2021 Husqvarna FS 450 will be marginally quicker due to a quarter-inch reduction in the wheelbase.
- There’s a new seat cover. A Husqvarna spokesman says that the new seat cover has a texture that improves control and comfort.

- All the cool parts that you find on a Husqvarna supermoto racing motorcycle are still there. The FS 450 has Alpina wheels with Bridgestone slicks (including a 16.5-inch front rim), Brembo braking calipers, carbon-fiber/polyamide rear subframe, and a ProTaper handlebar, plus a 63-horsepower SOHC powerplant with two engine maps, launch control, traction control, a Pankl five-speed transmission, with a Suter slipper clutch.
- The 2021 Husqvarna FS 450 hits the dealer showrooms in October with an MSPR of $11,299. The color is the traditional mixture of white, blue, and yellow.
2021 Husqvarna FS 450 Specs
ENGINE
- Type: Single-cylinder 4-stroke
- Displacement: 450cc
- Bore x stroke: 95 x 63.4 mm
- Maximum power: 63 horsepower
- Compression ratio: 12.75:1
- Valvetrain: SOHC, 4 valves
- Fuel System: Keihin EFI w/ 44 mm throttle body
- Ignition: Keihin EMS
- Starting: Electric w/ Li-Ion 2.0 ah battery
- Lubrication: Pressure lubrication w/ 2 oil pumps
- Transmission: Pankl 5-speed
- Clutch: Suter slipper clutch w/ Magura hydraulics
- Frame: Central double-cradle, chromoly steel w/ composite carbon-fiber/polyamide subframe
- Subframe: Aluminum
- Handlebar: ProTaper 28-22mm diameter w/ ODI grips
- Front suspension; travel: Fully adjustable WP Xact inverted 48mm fork; 11.2 inches
- Rear Suspension: Linkage-assisted WP Xact shock; 10.5 inches
- Wheels: Alpina
- Front tire: 125/60 x 16.5; Bridgestone Battlax Supermoto
- Rear tire: 165/65 x 17; Bridgestone Battlax Racing
- Front brake: 310mm disc w/ Brembo 4-piston caliper
- Rear brake: 220mm disc w/ Brembo single-piston caliper
- Wheelbase: 58.5 inches
- Rake: 26.1 degrees
- Triple clamp offset: 16mm
- Fuel capacity: 1.85 gallons
- Curb weight: 238 pounds