New Beta RX 450 4T model details, with links to new and used dealer listings and latest Beta deals

A few months ago, Beta’s project to expand the boundaries of RideAbility has officially landed in the new Motocross dimension, and the Tuscan company is already set to enhance its models day after day, and to keep its bikes simply at the top.

RX 450 was officially the first 4-Stroke Cross bike built by the manufacturer from Rignano sull’Arno, and, for fans, it was also the chance to ride a Made in Beta MX derived from the race prototype, which has now been racing for four years in the MXGP World Championship.

While RX 300 2T is a Cross-Country bike launched as an exclusive for the US market in 2021, which started off as an Enduro-derived project, and was brought closer to the world of motocross with a series of specific adaptations. The success of this project and the ever-growing experience in the MXGP World Championship with the 450 4T, have led the Tuscan brand to open the throttle, and configure the RX 300 as a fully-fledged motocross bike, with only a few things in common with the Enduro models.

With the Model year 2025, RX 300 underwent a series of important interventions to the engine and to the suspension and frame, which totally break away from the Enduro world and, like RX 450, configure a standalone project, completely dedicated to Motocross.

RX 450 also received exciting new updates that sharpen the model’s weapons, ready to do battle on MX tracks around the world.
Within so many changes for the new RXs, the thing that stays the same is the project’s goal: to equip the bike with a frame, engine and components of the highest level, and bring the new frontier of RideAbility to the MX world.

What does RideAbility mean for Beta? It means designing and building bikes whose rideability is their core value. Each Betamotor-branded motorbike is designed by the Florentine manufacturer to provide any rider with a motorcycle which is simultaneously easy to ride and high in performance. A product able to extract the best from any rider, thanks to an engine-frame combination which is able to provide a fun ride, without any reason to ever fear the world championship-level performance of the engine.

RX 300 and 450 perfectly meet this goal, each in its own way: both represent the perfect combination of power and control, by placing handling and Betamotor’s typical family feeling ease of use at the centre of the design, fully focused on uncompromising fun.

Let’s dive into the details of the RX 450 4str:

• Rear sub-frame and filter box: while the rear sub-frame’s geometry and the filter box remain the same, the structure has been suitably 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 intuitive, as well as being tool free.
• Suspension: fork and single shock receive a new calibration that enhances the bike’s character, both in terms of handling and stability when increasing the pace. The result is an improvement of the features already highlighted by MXGP riders for this model – manoeuvrability and stability that instil confidence in every rider, regardless of their level.
• Battery: for safe first-shot ignitions, even in the most severe conditions of use, a new lithium battery has been mounted on RX MY25, with an amperage higher than the previous one, to always have the necessary starting power.
• Final ratio: to find the ideal compromise between speed and acceleration, the rear sprocket now has 51 teeth – one more than the previous model – to improve the engine response coming out of corners as well as allowing the engine to build RPM quicker.
• Graphics: while the superstructures recently introduced with the new tail remain unchanged, new, more sleek and aggressive graphics have been introduced, which do not lack character in highlighting the racing soul of the model.

In addition to this, there are a series of updates common to the two models, such as:

• Silent handlebar block: comfort and Motocross are notoriously two rather distant concepts, but with the new Silent blocks equipped on this model, this distance is significantly bridged. With the aim of making the grip on the handlebar – and therefore control on the bike – as comfortable as possible, this new model upgrade reduces vibrations and raises the handlebar by 5 mm compared to the previous model, tiring the rider less and thus improving performance.
• 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.
• Swingarm: the rear wheel axle pin has been reinforced, gaining 2 mm in diameter, for a total of 22 mm. This new component guarantees greater stiffness and torsional resistance, resulting in a bike that is always precise and well steered, even in the most violent accelerations.

To complete our round-up of the bike:

• Engine maps: both the RX models are equipped with two specific engine maps (wet and dry), while the 4-Stroke model has also four levels of Traction Control (on/off/active with hard map/active with soft map) to manage the vehicle’s significant power in all terrain conditions. The button to select the map and TC is located on the handlebar bumper.
• The RX is delivered with customised kickstand and 4 different throttle pulleys, to customise the accelerator response.