FIRST LOOK! 2025 BETA 450RX & 2025 BETA 300RX

Press release: Beta USA entered the motocross world in 2021 with the introduction of their 300 RX, a 2-stroke model that provided a solid platform in design, handling, and looks. Along with the beauty of the bike, the “factory sound” of the 293cc motor was like no other. Riders quickly discovered what Beta likes to call Rideability. In 2024, Beta launched another RX model that would show off the talents of the engineering team based in Florence, Italy, the 450 RX 4 stroke had been tested in the prestigious MXGP class for more than three years as a factory prototype model. The production version of this prototype was very well received by riders as well as the media. 

For the 2025 season, Beta is proud to release the details of both the 300 and 450 RX with updates to enhance both models. Updates to the 300 include changes to the engine, chassis, and suspension. A new frame highlights the model, one that mimics that of its older 450 brother. 

The Beta 450RX in action. 

The 450 RX model also received updates bringing it closer to perfection than ever. Updates to sharpen the model’s weapons, ready to do battle on MX tracks throughout the USA. An even-stronger rear aluminum subframe, suspension upgrades, as well as a more powerful lithium battery are just a few. 

What does Rideability mean for Beta? It means designing and manufacturing motorcycles with a balance and feel that makes them easier to ride. A motorcycle able to get all the best from any rider, thanks to an engine-frame combination which is fun to ride yet does not tire the rider with an engine that is more forgiving, an engine that is focused on putting power to the ground and creating a center of gravity balance that is not found in many other brands. This feeling can only be felt by riding the bike, a feeling that Beta owners already know. 

2025 BETA 300RX TWO-STROKE UPDATES 

• Frame: Similar to the 450, specifically dedicated for motocross use, Chro-moly with a larger backbone to increase stiffness while enhancing the turning. The new frame also has an updated mounting for the new rear brake master cylinder. 
• Rear Brake Master Cylinder: New design, similar to the 450, large capacity for reduced fluid temperatures and better modulation and feel.
• Rear sub-frame and filter box: In-line with the use of the new frame, the rear subframe is fabricated from aluminum similar to the 450. This new subframe along with the plastic tray system, allows for components under the seat such as the battery and starter solenoid to be more compact reducing the overall bulk. The tool-less push button seat removal system is also incorporated into the new subframe.
• Engine: Updated cylinder porting and new matched cylinder head along with a new ignition timing curve has increased the bike’s overall power. The engine pulls harder and longer with this new design. Combined with an all-new 5 speed gearbox specifically for motocross, finished off with a stiffer spring for the diaphragm clutch pack, all provides for a complete package.

The 2025 Beta 300RX will be available in August 2024 for $9,499.

• Footpegs: the 2025 model receives new, less bulky footpegs, with an enhanced grip performance provided to the rider’s boot, to keep the bike under control at all times.
• Exhaust: An updated expansion chamber attached to a shorter silencer specific for moto.
• Radiators: New design that allows for a greater turning radius.
• Suspension: Closed cartridge 48mm KYB front fork and the rear shock have been updated with new valving for better overall performance. The 300 receives a larger, 50mm shock body to reduce the oil temperatures under extreme use during long motos.

• Handlebar Mounts: Isoelastic handlebar mounts are used to reduce vibration, these bar mounts also raise the handlebar height 5mm.
• Bodywork: Along with the aluminum subframe, the rear plastic is now a three-piece design. A new, smaller fuel tank (1.8 gallon) has been installed to reduce the overall weight and center of gravity. The MAP switch has been moved to the handlebar pad for ease-of-use.
• New Graphics and Colors: More “Italian” red showing off the heritage of the Beta brand, tied together with new graphics for 2025 bringing a fresh new look to the RX.

2025 BETA 450RX FOUR-STROKE UPDATES

• Suspension: Closed cartridge 48mm KYB front fork and the rear shock have been updated with new valving for better overall performance. 
• Rear sub-frame and filter box: while the rear sub-frame’s geometry and the filter box remain the same, the structure has been reinforced in a series of points that stiffen and strengthen it, maintaining lightness and ability to absorb stresses. Access to the filter remains on the left side of the bike and is extremely easy and requires no tools to access.
• Battery: A stronger lithium battery ensures quick starts while remaining very light in weight.
• Final ratio: Rear sprocket has been replaced with a 51 tooth for a quicker “spin-up” of the power delivery.

The 2025 Beta 450RX will be available in October 2024 for $10,999.

• Handlebar Mounts: Isoelastic handlebar mounts are used to reduce vibration, these bar mounts also raise the handlebar height 5mm.
• Rear Axle: The rear axle diameter has been increased to 22mm to reduce flex as well as provide better durability.

New rear axle. 

• Footpegs: the 2025 model receives new, less bulky footpegs, with an enhanced grip performance provided to the rider’s boot, to keep the bike under control at all times.

We’re thankful for new footpegs. The 2024 footpegs are slippery. 

• New Graphics and Colors: More “Italian” red showing off the heritage of the Beta brand, tied together with new graphics for 2025 bringing a fresh new look to the RX.
• Updated Engine Mapping: The mapping has been updated with the latest settings that have been tested by the Beta race team. This along with traction control completes the electronic package of the RX model.
• Throttle Pulleys: Each 450 RX arrives with three extra throttle pulleys, all with a different ratio to allow riders to install the ratio to their liking.