The 2024 Beta 450 RX is the Italian brand’s first four-stroke motocross bike. It follows the 300 RX two-stroke and comes from a company known for enduro and trials bikes hand-built in Florence, Italy.
Rather than targeting professional racers, the 450 RX is intended as an everyman’s competition machine—forgiving, while still encouraging aggressive riding, in keeping with the Beta tradition of rideability.
The all-new engine draws on Beta’s MXGP effort. The oversquare 449cc DOHC four-valve single has a counterbalancer, and fueling is through dual injectors and a 46mm throttle body fed by a new airbox. Two power maps and four levels of traction control, including off, are available, and starting is electric.
The 5-speed transmission has motocross-specific ratios. The diaphragm-style clutch has three engagement settings and Brembo hydraulics.
The 450 RX gets its own chromoly steel double-cradle frame. The main spar is wider than on Beta’s enduro models, and the aluminum subframe adds rigidity. The frame is built to handle big motocross jumps while staying supple enough for cornering.
KYB supplies the suspension: a fully adjustable 48mm AOS closed-cartridge fork with 12 inches of travel and a linkage-assisted fully adjustable shock with 11.8 inches. The setup is tuned for stability and a supple ride.
Blue anodized Excel rims, 21 inches in front and 19 inches in back, wear soft/intermediate Maxxis Maxxcross MX-ST tires developed with Jeremy McGrath. Nissin calipers grip a 260mm front disc and a 240mm rear disc, and the rear sprocket is red-anodized aluminum/steel.
A bike stand and four throttle pulleys for tailoring throttle response come with the 2024 Beta 450 RX, which is priced at $10,999.
2024 Beta 450 RX Specifications
ENGINE
Type: 4-stroke single
Displacement: 449cc
Bore x stroke: 97 x 60.8mm
Compression ratio: 13.4:1
Valvetrain: DOHC; 4 valves
Fueling: EFI w/ 46mm throttle body and dual injectors
Lubrication: Separate oil for engine and transmission
Benda motorcycles are beginning to make a ripple on US shores with four intriguing and competitive models, courtesy of its partnership with Keeway Group. We were impressed with the Napoleonbob 500 and have now gotten our gloves on the persuasive, entry-level 2026 Benda Chinchilla 300, with its modest MSRP of $4999. It would be difficult to design a more welcoming entry-level cruiser than this easy-handling, visually appealing boulevard bobber. Editor Don Williams and Associate Editor Kelly Callan discuss the Benda Chinchilla 300 and how it actually rode for them.
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Our guest this episode is Jesse Merriman, Chief Technician for Jeremy McWilliams at the Arch Motorcycle racing project. Arch Racing was founded by Gard Hollinger and Keanu Reevs to compete in the Moto America Super Hooligan race series. Teejay Adams chats with Jesse about the Arch motorcycle and the challenges of extracting the absolute most from an air-cooled V-Twin racing engine and custom chassis.
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Here’s quick reminder to check out our monthly digital magazine. It’s filled with everything you want to read on motorcycling, including some things you’ve probably not seen elsewhere. It’s absolutely free and you will find it on the Apple App Store and of course on Google Play as well.
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![2024 Beta 450 RX Buyer’s Guide [Specs, Price]](https://ultimatemotorcycling.com/wp-content/uploads/2023/11/2024-beta-450-rx-first-look-motocross-8-768x512.webp "2024 Beta 450 RX Buyer’s Guide [Specs, Price]")
