2024 Beta 450 RX Review – Specs

Introducing the highly anticipated 2024 Beta 450 RX, the latest addition to Beta’s impressive lineup. Prepare to be amazed as Beta, renowned for their top-tier enduro and trials bikes meticulously crafted in Florence, Italy, sets foot in the realm of four-stroke motocross machines. Building on the success of the trailblazing 300 RX two-stroke three years ago, Beta now enters the thrilling world of thumpers. It’s time to discover what this blossoming boutique brand has in store for the motocross community.

Ben Watson, Beta MRT Racing. Photograph by S. Taglioni.

The 2024 Beta 450 RX is not only designed for professional motocross racers. It has also been positioned as the ultimate competition machine for every enthusiast out there. As per a trusted source within Beta, the 450 RX offers a higher level of forgiveness without compromising on the exhilarating performance that will surely ignite a passion for aggressive riding. Rest assured, it upholds Beta’s strong legacy of delivering exceptional rideability.

The engine boasts a remarkable and innovative design, incorporating valuable insights from Beta’s MXGP endeavor. However, it maintains the reliability you’ve come to expect from a solidly built DOHC four-valve motor, complete with a counterbalancer. Fuel is efficiently delivered through dual injectors and a 46mm throttle body, while fresh air is drawn in through a state-of-the-art airbox. To enhance your riding experience, the system offers two preset power maps and an impressive four levels of traction control, including an option to turn it off completely. Easy and hassle-free, starting is done with a simple push of a button, thanks to the electric ignition.

The 450 RX boasts an impressive five-speed transmission and diaphragm-style clutch, making it a force to be reckoned with. Its motocross-specific gearbox ratios and three engagement settings ensure optimal performance.

But that’s not all – Beta has gone above and beyond by designing this model with its own frame. Featuring a wider main frame spar and an aluminum subframe for added rigidity, the 450 RX is built to withstand the intensity of motocross, including those heart-stopping big jumps. Rest assured, though the frame has been beefed up, Beta assures us that it remains incredibly agile for smooth cornering. This is a dirt bike that’s tough enough for the most demanding motocross circuits while maintaining the necessary flexibility for precise maneuverability.

KYB handles the Beta suspension flawlessly. These top-notch components have been expertly configured by Beta technicians in Italy, ensuring a ride that is both stable and luxuriously smooth. It perfectly aligns with our commitment to optimal rideability.

The wheels are made with top-notch materials. The 21-/19-inch wheelset features durable blue anodized Excel rims, high-performance Maxxis Maxxcross MX-ST tires (tested and developed by Jeremy McGrath), and reliable Nissin brake calipers. Additionally, the rear wheel is equipped with a sturdy aluminum/steel sprocket that is enhanced with red anodizing.

The 2024 Beta 450 RX comes with some great extras. It includes a bike stand and four throttle pulleys that give you the flexibility to customize the throttle response to your preferences. You can get your hands on this impressive motocrosser for just $10,999. Keep an eye out for it at Beta dealers in December, right before Colt Nichols starts tearing up the Monster Energy Supercross tracks as part of the Liqui Moly Beta Racing Team.

2024 Beta 450 RX Specs


  • 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
  • Transmission: 5-speed
  • Clutch: Wet multiplate w/ Brembo hydraulics
  • Final drive: D.I.D chain


  • Frame: Double cradle chromoly steel w/ aluminum subframe
  • Front suspension; travel: Fully adjustable KYB AOS closed cartridge 48mm inverted fork; 12 inches
  • Rear suspension; travel: Linkage-assisted fully adjustable KYB shock; 11.8 inches
  • Rims: Excel
  • Tires: Maxxis Maxxcross MX-ST
  • Front tire: 90/100 x 21
  • Rear tire: 110/90 x 19
  • Front brake: 260mm disc w/ Nissin caliper
  • Rear brake: 240mm disc w/ Nissin caliper


  • Wheelbase: 58.4 inches
  • Seat height: 37.2 inches
  • Ground clearance: 13 inches
  • Fuel capacity: 1.8 gallons
  • Wet weight: 239 pounds
  • Color: Red/blue
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