The 2020 Husqvarna FS450 remains mostly unchanged from the previous model year with 2020 models arriving in September 2019. 
Begin Press Release: 

HUSQVARNA MOTORCYCLES? MY20 FS 450 AVAILABLE IN SEPTEMBER OF 2019
FORMIDABLE PERFORMANCE FROM THE MOST ADVANCED 450 CC SUPERMOTO 

Husqvarna Motorcycles is pleased to announce the release of the MY20 FS 450 ? the only OEM produced, single-cylinder competition supermoto machine available on the market. 
Featuring a compact, powerful engine combined with a lightweight frame and modern bodywork, the FS 450 delivers confidence inspiring handling and incredible overall on-track performance, continuing Husqvarna Motorcycles? long and successful involvement in the supermoto segment. The perfect combination of power and agility, the FS 450?s SOHC engine features a newly-shaped, lightweight CP piston and electric start and gives riders a plentiful and responsive supply of power, delivered through a PANKL Racing Systems 5-speed gearbox.
Aiding the bike?s superior performance, a compact cylinder head design, which positions the engine?s camshaft closer to the bike?s center of gravity, ensures unmatched handling and high-speed maneuverability. Carefully engineered levels of frame flex ensure excellent rider feedback and straight-line stability.   
The FS 450?s functional bodywork delivers ergonomics that allow for superior comfort and control, ensuring increased rider performance over longer periods of time. WP XACT 48 mm front forks...