The 2025 Beta 450 RX enters its second year with a clear focus: real-world Rideability in a full-size motocross package. After a strong 2024 season that included two top-ten AMA Supercross finishes, Beta continues refining the RX with the same philosophy—build a bike that performs at a high level, but still feels comfortable and controllable for the everyday rider.

The 450 RX engine is tuned around strong mid-range power, where most riders spend the majority of their time. Combined with Beta’s balanced chassis layout, the result is a motocross bike that drives hard out of corners, carves berms smoothly, and stays less fatiguing thanks to a predictable, non-abrupt delivery.

2025 Updates

• Revised fork and shock settings to keep the fork higher in the stroke and improve feel over square-edge chop

• Larger battery for higher output and quicker starting

• Updated final ratio with a 51T rear sprocket for stronger corner drive

• Smaller, lighter Nissin front brake caliper for better feel and modulation

• Xtrig FlexFix mounts reduce vibration and raise the bar 5mm

• New footpegs with improved bite

• Larger 22mm rear axle (up from 20mm) for added rigidity

• Updated engine mapping for 2025