MY26 RX 250 2T

The all-new RX 250 2Str provides MX2 riders with a high-performing platform, a high-output, explosive engine providing a high level of fun that is different from the 2025 RX 300, which competed in the MX1, against 450 4Str, except for specific events for this kind of engine capacity. Therefore, the RX 250 expands the possibility of using Beta motocross models in different classes.
A true revolution for RXs, retaining the same project’s goal: to equip the bike with a frame, engine and
components of a high level, and bring the new frontier of RideAbility to the MX world.

Engine: both engine capacities received completely new, purpose-built engines. The RX 350 2Str was designed to obtain the greatest linear power delivery and give riders the option to exploit the great power available when needed, while the RX 250 2Str can count on explosive performance, ready to compete in races under all conditions.

Head: The first noticeable difference when looking at the new engines is certainly the dualspark-
plug head on the RX 350 2Str, while the 250cc still relies on a classic single spark plug.
This differentiates the two motorcycles’ character even further, with the 250cc providing riders
with a high-revving engine that competes with the likes of 250 4Str bikes, while the 350cc
manages to keep a greater torque and rounded delivery, enhancing its ease of recreational use,
at lower speeds while still provides enough overall horsepower for race use.

Cylinder, piston and power valve: to further differentiate the two bikes – apart from the obvious
engine capacity – Betamotor engineers worked on new cylinders and pistons, designed
specifically for each engine. The power valve too was calibrated accurately to manage the two
deliveries, by adopting different springs.

Crankshaft: the two motorcycles have a different stroke, with the 250cc reaching 72mm and
the 350cc reaching 73.6mm.

Crankcase: new engine crankcases, with different internals between the two capacities,
matched with each models’ crankshaft.

Gear box: gear boxes are shared between both models with the only difference being the final
ratios of the sprockets, 13/50 for the 250 and a 14/47 for its big sister.

Exhaust: also new for both models. Exhaust systems were designed to enhance the features of both engines, and differ in the internal silencer diameter, which is bigger on the 350.

Graphics: a modern race look, simple yet bold, the final touch to the Italian RX range.

Radiators: their bearing structure was strengthened to prevent any deformation that might affect their
operation, even during heavy-duty use.

Frame: geometry remains unchanged, yet the frame now incorporates a cast-in brace to further strengthen the frame around the steering neck area. This increases the reliability and stiffness of the frame’s area most subject to stress.

Aluminium rear sub-frame and dedicated filter box: aluminium gives the right level of stiffness to the structure. Light, yet has the rigidity to overcome the demands of motocross. Access to the filter remains on the left side of the bike, and is extremely easy and intuitive, as well as being tool free. The push button seat also removes without tools.

Kayaba suspensions: fork (48mm) and single shock (50mm) are specifically calibrated on the new range models, focusing on their rideability and stability when the pace rises. The resulting setting is enough to make any rider confident, from amateurs to professionals.

Nissin braking system: with floating callipers and 260mm Galfer discs at the front and 240mm at the rear, for powerful and modular braking.

Chain: non o-ring, lighter and smoother.

Lithium battery: lighter and a must for quick starts.

Handlebar silent block: Xtrig Flexfit bar mounts provide a comfortable grip on the handlebar for enhanced control and reduced vibration.

Engine maps: all 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 bumpers.

All RX will be supplied with personalized kickstand.