The new FJ 350 sports the bigger 334cc engine, which produces 28.7 bhp and 29.6 Nm of torque through a six-speed constant mesh gearbox. The redesigned unit significantly improves noise and vibration levels, thermal management, and overall performance. 

Classic Legends offers the new Jawa 42 FJ 350 in four matte colour options and one chrome option. The matte options include Aurora Forest Matte, Cosmo Blue Matte, Deep Black Matte Red Clad, and Deep Black Matte with Black Clad. The only chrome option that is available is named Mystique Copper.

The 2024 Jawa 42 FJ 350 features a more aggressive design than the conventional 42. The fuel tank features various designs that vary depending on the color option opted for. While the side panels and fenders have been carried over, the new 42 FJ features a revamped seat design and updated ergonomics that require a more dedicated seating posture.

The motorcycle is built on a double cradle chassis and is supported by telescopic forks in the front and twin shock absorbers in the back with pre-load adjustment. The Jawa 42 FJ 350's braking system includes a 320 mm front disc and a 240 mm rear disc. The motorcycle also comes with dual-channel ABS and an accessible ground clearance of 178 mm. 

The motorcycle comes with a new designed for its alloy wheels and these bring a machined look. The FJ 350 further ffeatures an off-set fuel tank cap and an upswept dual-pipe exhaust system. It has an LED headlight, a digital instrument cluster, and an assist and slipper clutch.