Beta launches the 250 RX four-stroke and strengthens its 2027 MX range

Beta is not content with a detailed update for its 2027 vintage. The Tuscan manufacturer adds above all a real novelty to its RX family: a 250 four-stroke designed for modern motocross, in parallel with developments on the 450 RX and the 250 and 350 two-strokes.

Key takeaway - Beta enters MX2 with the 250 RX 4T 2027 and updates its 450, 250/350 2T, with electronics, chassis and tires revised.

The 250 RX 4T puts Beta into MX2

This is the most striking information of this presentation: the RX 250 4T officially joins the Beta motocross range for the 2027 model year. The model had already been seen in the form of a prototype during a sortie in Mantova, entrusted to test rider Francesco Bassi. It is now a production model integrated into the RX family.

Beta highlights a completely new engine. The brand specifies a DOHC architecture with a chain positioned to the right, therefore in a different configuration from that of the 450 RX. The stated objective is clear: to gain in compactness and mass, with an announced reduction of about 1,5 kg compared to the competition according to Beta.

What Beta worked on the engine

To achieve this result, the brand cites several technical solutions:

• Lightened internal casings
• Magnesium cowl cover
• Double injection, at the butterfly housing and the air box level
• Forged steel lever crankshaft
• Monolithic bearing
• "Box-in-box" type piston
• 5-speed gearbox derived from the 450, but redesigned for this engine
• Cooling by closed turbine, in order to maintain reduced bulk and avoid external piping
• Starting on the left side and lubrication by dry crankcase
• Redesigned exhaust system

The interest for the rider is quite readable: Beta is looking to offer a 250 4T more compact, more modern in its engine management and simpler to integrate into a chassis dedicated to the discipline.

Unprecedented electronics at Beta on a cross four-stroke

The RX 250 4T also inaugurates an electronic system never seen before from Beta on a four-stroke motocross. The brand announces:

• 5-level Launch Control
• Quick Shift
• 2-level Traction Control
• Double mapping

The whole set is ordered from a new commode integrated into the handlebar foam. This is an important point, because it places the 250 RX in a logic more directly oriented towards racing and quick adjustments depending on the track.

Practical overview: what it can bring in running

A dedicated chassis and adapted KYB suspension

The RX 250 4T does not simply take over the base of the 450 without adaptation. Beta announces a specific chassis, with lateral mounts for the cylinder head, while the 450 uses central mounts. The aim is to increase torsional rigidity.

On the rolling train side, the motorcycle retains KYB suspensions from the 450, but with settings specific to the 250. The brand also mentions a rear rim with a narrower section.

These choices show that Beta does not treat the 250 as a simple engine variant. The logic is that of a model in its own right, adapted for MX2 use.

The 450 RX also gains efficiency

The older sister is not forgotten. The RX 450 4T receives several evolutions focused on ease of operation and response accuracy.

Beta adds in particular:

• Quick Shift
• Launch Control
• Refined traction control
• Updated cartographies
• New integrated control panel
• Butterfly case revised with a new internal conical connector

The brand thus announces a response to the faster accelerator and more linear power. Again, the idea is not to upset the motorcycle, but to make the engine more exploitable.

The 250 and 350 2T are also evolving

The RX two-stroke range benefits from several useful retouches. On the RX 350 2T, Beta adopts a new, lightweight piston, with PVD-treated segments. The brand claims a gain of about 1.5 hp at the same configuration.

On the RX 250 2T, the final ratio evolves from 13/50 to 14/51, which should offer a more progressive transmission on acceleration, especially when exiting a corner.

Both models also receive reinforced silencers and the new Dunlop tires, presented as lighter.

Improvements common to the entire RX range

Beyond the motorizations, Beta applies several new features to the entire RX family:

• Reinforced chain guide
• Rethought pinion cover and compliant with regulations
• New more flexible handles
• Unprecedented red and black decoration
• Dedicated crutch provided if necessary

The 4T versions also benefit from four interchangeable gas control pulleys.

Availability: an arrival spread over the summer

Beta indicates that the RX 450 4T will be available from mid-June. The RX 250 4T and the RX 250/350 2T will arrive in July. On the other hand, no price has been announced at the time of this announcement.

This strengthening of the RX range confirms that Beta is now structuring its motocross offer around a more complete set, with a real entry into the field of the MX2 four-stroke and consistent developments on the other displacements.

To remember

• The Beta RX 250 4T becomes the new entry-level four-stroke model of the RX range.
• Beta announces an unprecedented engine, more compact and lighter.
• The motorcycle receives a very complete electronics for a Beta cross.
• The 450 RX, the 250/350 2T and the equipment of the entire range are also updated.
• The prices are not yet known.

In summary, Beta is not only launching a new model: the brand clearly enriches its 2027 motocross range with a more ambitious and homogeneous technical approach across the entire RX range.

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