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BETA RX 2027 test: every update across the range
The BETA RX 2027 range welcomes a brand new 250 F and evolves its three existing models. Revised transmission, new piston, modernized electronics, recalibrated suspensions and new black and red presentation: here is our complete technical analysis.
The BETA RX 2027 range includes four models: RX 250 2T, RX 350 2T, RX 250 F and RX 450 F. The main new features are the new RX 250 F, the 14/51 transmission of the 250 2T, the new piston D78 of the 350 2T and the revised electronics of the 450 F.
The BETA RX 2027 range is changing dimensions. To the already known RX 250 2T, RX 350 2T and RX 450 F, a completely new RX 250 F is added. The three renewed models do not just have a different decoration: transmission, engine head, exhaust, electronics and suspension settings evolve according to the displacements.
This test is a Detailed technical analysis Based on official BETA information and on the comparison of the split views 2026 and 2027. It allows to distinguish the real mechanical modifications from simple changes in references or finish. A dynamic test will naturally complement this assessment as soon as the production motorcycles are available.
BETA RX 2027: a motocross range now complete
With four models, BETA now covers the main expectations of modern motocross. The two two-strokes retain their light and direct character, while the 250 F and 450 F meet the most contested four-stroke categories.
| model | engine | capacity | Announced weight | Major evolution 2027 |
|---|---|---|---|---|
| RX 250 2T | 2 times | 249,3 cm³ | 100 kg | Final transmission 14/51 and extended reports |
| RX 350 2T | 2 times | 351,7 cm³ | 100 kg | New piston D78 and PVD segments |
| RX 250 F | 4 times | 249,8 cm³ | 101 kg | New model, dedicated engine and chassis |
| RX 450 F | 4 times | 449,3 cm³ | 104,5 kg | Electronic and modernized controls |
The announced weights are given for the manufacturer's information only and may vary depending on the configuration and measurement method. They nevertheless show the desire to maintain a compact range, including for the new 250 F.
The novelties common to all BETA RX 2027s
The first difference is visual. The RX 2027 adopt a presentation Black and red More aggressive, with new graphics. But several common improvements have mainly a practical function on the track.
- New Dunlop tires Original mounts on the range.
- KYB settings specific to each displacement, in order to adapt the hydraulics to the weight, the engine brake and the behavior of each engine.
- Reinforced chain guide To better withstand shocks and repeated constraints.
- Expanded crown protection, designed to further secure the secondary transmission.
- More flexible handles To improve comfort and reduce hand fatigue.
BETA, on the other hand, retains the proven frame geometries tested on the RX 250 2T, RX 350 2T and RX 450 F. The manufacturer therefore favors a targeted evolution rather than an unnecessary redesign of already performing basics.
BETA RX 250 2T 2027: a longer transmission
The RX 250 2T receives one of the easiest modifications to identify: the final transmission goes from 13/50 in 2026 to 14/51 in 2027. becomes longer. BETA also announces revised gearbox reports in order to more effectively exploit the engine extension.
On the track, this evolution must limit unnecessary gear changes, make the motor skills more progressive and allow to maintain a gear ratio longer between two turns. It can also slightly calm the response to the rear wheel on slippery terrain without erasing the character of a 250 two-stroke.
The comparison of the spark plugs also reveals revised references in the bottom engine and ignition. We must remain careful: a change of reference does not always mean an entirely different architecture. It may correspond to an evolution of material, supplier or industrial tolerance. The whole confirms however a broader development work than just the change of gear and crown.
Finally, the silencer adopts a Reinforced conical internal tube. . This solution aims to improve vibration and shock resistance, while preserving the motor response and the expected sound level.
BETA RX 350 2T 2027: new piston and increased power
The RX 350 2T retains its particular positioning: more torque than a 250, less inertia and perceived mass than a large four-stroke engine. For 2027, the main evolution concerns the top engine.
BETA installs a New piston with a diameter of 78 mm Associated with segments benefiting from PVD treatment. This coating reduces friction and improves wear resistance in severe conditions. The manufacturer announces a gain of about 1.5 hp.
This power increase does not transform the philosophy of the motorcycle. The expected interest is mainly a fuller response in the mid-ranges and better continuity in the opening of the throttle. For a rider who wants to ride on a higher gear ratio and limit gear changes, the 350 2T should remain one of the most efficient RXs.
Like the 250, it receives the reinforced silencer. The essential basics of the engine and chassis remain close to the 2026 model year: the work therefore focuses on the performance, reliability and operating precision rather than on a complete revolution.
New BETA RX 250 F 2027: the big news
The RX 250 F is the major new addition to the range. It is neither a reduced 450, nor a simple adaptation of an existing engine. BETA announces a motorcycle developed around a Four-stroke single-cylinder of 249,8 cm³, with a bore of 78 mm and an architecture designed to operate at high speed.
A compact double injection engine
The engine adopts a distribution Double overhead camshaft, a hydraulic tensioner, a dry sump and a five-speed gearbox. The power supply is based on Two injectors. . This solution allows better management of fuel spraying according to the speed and load, with the objective of maintaining low-speed torque while properly feeding the engine in revolutions.
The hydraulic clutch must offer constant control throughout a lap. Dry sump lubrication helps to control the movement of the oil and reduce losses due to sloshing, an important point on a very demanding small four-stroke engine.
Quick Shift, Launch Control and modern electronics
The new 250 F receives the Quick Shift To shift gears without completely cutting off the gas, as well as a Launch Control adjustable on five levels. This electronics must help the rider adapt the start to the level of grip and the preparation of the grid.
The frame is specific to this motorization. BETA retains a KYB fork and shock absorber, but with settings developed for the low inertia of the 250 four-stroke. The narrower rear rim also contributes to the handling and placement of the motorcycle in the grooves. With 101 kg announced, the RX 250 F clearly aims for a light and lively sensation.
BETA RX 450 F 2027: modernized electronics
The RX 450 F does not change its philosophy. Its 449,3 cm³ engine and its cycle part remain known, but the electronics are progressing. The 2027 model year receives a New control panel Giving access to mapping, traction control, Quick Shift and five-level Launch Control.
The study of the exploded views highlights revised references at the beam and electronic management level. The modifications are consistent with the new interface announced by BETA. Developments also appear around distribution and lubrication, without this meaning a completely redesigned engine.
At the back, the spring reference changes, but the tuning remains announced in K 5.4. is important: a new reference can translate a change in manufacturing or finishing without changing the nominal stiffness. The final behavior will mainly depend on the new KYB hydraulic adjustment.
On the track, the objective is clear: to make the power of the 450 easier to operate. Mapping and traction control do not replace chassis tuning, but they allow you to adapt the engine response to hard, loose or degraded terrain.
BETA RX 2026 / 2027 comparison: what really changes
| model | Preserved elements | New arrivals 2027 |
|---|---|---|
| RX 250 2T | Engine architecture, frame and general philosophy | Transmission 14/51, extended gears, revised engine and ignition references, reinforced muffler |
| RX 350 2T | Engine base, frame and displacement | Piston D78, PVD segments, about 1.5 hp additional, reinforced quiet |
| RX 250 F | No equivalent RX 2026 | New engine, new frame, dual injection, Quick Shift and Launch Control |
| RX 450 F | Engine architecture and frame geometry | Revised electronic control unit, beam and ECU, adapted KYB settings |
Which BETA RX 2027 to choose?
RX 250 2T: for the rider who likes to attack
The 250 two-stroke remains the most lively and the most demanding to maintain in its good operating range. Its extended transmission should make it more efficient on fast circuits and cleaner in handling.
RX 350 2T: the best compromise between torque and lightness
The 350 is aimed at the rider who wants a lot of torque without accepting the inertia of a four-stroke 450. The new piston and power gain further enhance this versatility.
RX 250 F: for precision and passing speed
The new 250 F will logically be the most suitable for riders who prefer precision, high revs and cornering speed. Its electronics complements the place directly opposite the references of the category.
RX 450 F: to exploit the torque
The 450 remains intended for riders capable of managing its power. The electronic aids of 2027 must however expand its range of use and make its engine more accessible when grip decreases.
Verdict: the BETA RX 2027 range really changes its dimension
The 2027 vintage is not just about a new color. The RX 250 2T sharpens its engine operation, the RX 350 2T gains in performance, the RX 450 F modernizes its electronics and the new RX 250 F finally completes the offer with a dedicated design.
The BETA strategy is consistent: to retain the basics that work, to intervene precisely on the points that influence the chrono and to add the model that was missing from the range. On paper, the BETA RX 2027 The most important is the 250 F. But for the owners of the existing models, the changes to the 250 2T, the 350 2T and the 450 F are sufficiently concrete to clearly distinguish the new vintage.
The next verdict will have to come from the track: starts, motor skills, suspension behavior at the end of the lap and ease of operation will allow us to measure the real extent of these developments.
FAQ on the BETA RX 2027 range
What are the models of the BETA RX 2027 range?
The range includes four motorcycles: RX 250 2T, RX 350 2T, RX 250 F and RX 450 F.
Did the BETA RX 250 F exist in 2026?
No. The RX 250 F is a completely new model for 2027, with a specially developed engine and chassis.
What is the main new feature of the RX 250 2T 2027?
Its final transmission goes from 13/50 to 14/51, with revised ratios to better exploit the engine extension.
How much power does the RX 350 2T 2027 gain?
BETA announces about 1.5 hp additional thanks in particular to the new piston D78 and the PVD treated segments.
Will the RX 450 F 2027 receive a new engine?
No. The general architecture is preserved. The main developments are in electronics, controls and several internal technical references.
Sources and methodology
Original article from RAW Motorsports, published on October 13, 2026. The 2026/2027 differences were established based on official BETA information and a model-by-model comparison of parts catalogs. Features may vary depending on markets and homologations.
Frequently asked questions
What are the models of the BETA RX 2027 range?
The range includes four motorcycles: RX 250 2T, RX 350 2T, RX 250 F and RX 450 F.
Did the BETA RX 250 F exist in 2026?
No. The RX 250 F is a completely new model for 2027, with a specially developed engine and chassis.
What is the main new feature of the RX 250 2T 2027?
Its final transmission goes from 13/50 to 14/51, with revised ratios to better exploit the engine extension.
How much power does the RX 350 2T 2027 gain?
BETA announces about 1.5 hp additional thanks in particular to the new piston D78 and the PVD treated segments.
Will the RX 450 F 2027 receive a new engine?
No. The general architecture is preserved. The main developments are in electronics, controls and several internal technical references.
