Review – Key Features – Features & Benefits – Specifications
2025 Beta 300 RX: SOLID HANDLING. SOLID LOOKS. SOLID DESIGN.
Introducing the 2025 Beta 300 RX…
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. Rideability is the smoothness, ease of handling, and overall comfort experienced on a Beta Motorcycle. It encompasses factors such as throttle response, suspension performance, ergonomic design, and stability all contributing to a seamless and enjoyable riding experience. Rideability is the perfect balance of power and agility that provides riders with confidence inspiring control and effortless maneuverability, resulting in a gratifying ride, no matter the conditions.
For the 2025 season, Beta is proud to release the details of the 300 RX updates to enhance its platform. 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.
Features: New durable frame similar to the 450 RX, new design of the rear master cylinder for reduced temperatures and better feel, new aluminum sub-frame, updated cylinder porting and new ignition timing to increase the bike’s overall power, five speed transmission, upgraded footpegs with enhanced grip and less bulk, updated expansion chamber, narrower radiators for greater turning radius, updated rear shock with larger body to reduce the oil temperature under extreme use, XTrig FlexFix handlebar mounts, smaller fuel tank, MAP switch to adjust power delivery, adjustable power valve, electric starter, and easy access air filter box.
2025 Beta 300 RX Guide Totalmotorcycle.com Key Features
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 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 300 RX Guide Totalmotorcycle.com Features and Benefits
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.
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 300 RX Guide – Totalmotorcycle.com Specifications/Technical Details
US MSRP Price: from $9,499 USD
Canada MSRP Price: from $ See Dealer CDN
Europe/UK MSRP Price: £ See Dealer GBP (On The Road inc 20% Vat)
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ENGINE TYPE
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Beta Built single cylinder, 2-stroke, liquid cooled, with BPV power valve system and counter balancer, electric start with back-up kick starter sold as an option
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Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).
