- Make:
-
Beta
- Series:
-
RX
- Model:
-
RX 450
- Year:
- 2026
- Engine:
- 450cc
- Mileage:
- 0 miles
- Style:
- Off-Road
- Colour:
- Red
- Condition:
- New
- Seller:
- Trade
- Price:
- £9,295
- Location:
- Northamptonshire
2026 Beta RX450 4T motocross bike, in stock and ready to ride today
RX 450 4Str is the fans’ chance to ride a Made-in-Beta MX closely resembling the race bike that’s been running in the MXGP World Championship for five years now and in the American AMA Supercross series since 2024. The Model Year 2026 RX 450 has been updated with a massive performance step, making the power delivery close to that of the factory bikes, while keeping the brand’s signature easeof control intact.
RX 450 4Str
Engine: the 450cc engine development was focused on providing riders a significant performance increase compared to the previous model, offering a stronger torque curve that can be used under all conditions. This achievement was possible due to a new cylinder head with a performance- enhancingpiston, a new intake manifold and a different exhaust system. The head’s overhaul – developed through CFD analysis and many flow bench calibrations – includes an improved intake duct to enhance aircirculation inside the engine. The new manifold, following the flow line, has a longer internal horn toimprove the tuning of pressure waves, and thus increase their fill while intaking air. The piston includes new coatings to reduce friction and improve its performance. A newly designed counter balancer wasintroduced to contain vibrations and reduce rider fatigue.
Exhaust system: the head-pipe has been redesigned to create a greater flow and to provide increased power. This new 4Str exhaust system is completed by a silencer, redesigned with HGS to contain the DB output, in line with the new racing standards.
Map: maps were updated to fair better with the new motor configuration, with renewed start-up and limiter strategies.
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
8 Market Square, Higham Ferrers, Northamptonshire, NN10 8BP
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