MY25 Beta MX 300/450RX

RX MY 2025
The Art of RideAbility in the MX World

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 two models and see an overview of the new features shared by both, such as the silent handlebar block, footpegs and rear axle:

RX 450 4T
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 instill 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.
The RX 450 already received interesting updates with the new Model Year, all the new features introduced on the RX 300 2T model from Beta are truly a surprise, with the following elements radically enhanced:
Frame: as in the 450, the RX 300 also gets the new frame, specifically dedicated for motocross use, retaining many known proportions from Beta models but with a series of specific redesigned and reinforced parts compared to standard Enduro models. Getting even with the 4T model, the frame acquires a wider main spar than in the past (1 cm more), which does not fear the stresses coming from repeated jump landings, resulting overall much stiffer in the lateral twists generated by high-speed bends. This translates into a precise, stable speed both entering and leaving corners, and which conveys a great feeling of safety in keeping the high performance of the engine tamed. The engine position and mounts are different from the Enduro models, and provide excellent balance both on corners and in jumps.
Rear sub-frame and filter box: in line with the use of the new frame, the new RX 300 inherits its older sister's aluminum sub-frame, as well as the filter box.
Fork: the Kayaba fork with 48 mm stems has greater travel than Enduro models, and receives a new calibration that recreates the perfect set-up together with the new single shock, ensuring a stable, fast and precise bike, yet always easy and precise in its response.
Single shock: the single shock is a new addition to this model, and, as for the 450, it switches to a 50 mm piston that allows greater support in jump landing, thanks to greater hydraulic braking, and guarantees constant performance with heavy use, where temperatures are on the rise.

Braking system