
THE NEW BETA RX RANGE 2027!
2027 BETA RX
Beta RX 250 4T MY27
THE NEW BETA RX RANGE 2027!
TBC
- •Beta’s official debut in the MX2 class with a 4-stroke. The new RX 250 4T is designed to offer the perfect balance between top-level performance and rideability, thanks to an extremely compact and lightweight engine unit — approximately 1.5 kg lighter than the competition’s standard — and advanced racing electronics featuring Quick Shift and Launch Control for maximum effectiveness on the track.
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Tech Specs
Beta RX 250 4-Stroke
Technical Specifications
Chassis
| Specification | Value |
|---|---|
| Frame | Molybdenum steel with double cradle split above the exhaust port |
| Wheelbase | 1475 mm |
| Max Length | 2170 mm |
| Max Width | 830 mm |
| Max Height | 1270 mm |
| Seat Height | 945 mm |
| Ground Clearance | 340 mm |
| Footrest Height | 422 mm |
| Dry Weight | 101 kg (front 48 kg; rear 53 kg) |
| Fuel Tank Capacity | 7.0 l |
| Cooling System Capacity | 1.4 l |
| Front Suspension | Kayaba sealed hydraulic cartridge front fork ø 48 mm fork tubes |
| Rear Suspension | Kayaba Monoshock with progressive compound lever ø50 mm |
| Shock Absorber Stroke | 133 mm |
| Front Wheel Travel | 305 mm |
| Rear Wheel Travel | 300 mm |
| Front Brake | Wave disc ø260 mm and double-piston floating caliper |
| Rear Brake | Wave disc ø240 mm and single-piston floating caliper |
| Front Rim | 21 x 1.6 - 36 holes |
| Rear Rim | 19 x 2.15 - 36 holes |
| Front Tyre | 80/100 - 21 |
| Rear Tyre | 100/90 - 19 |
Engine
| Specification | Value |
|---|---|
| Type | Single cylinder, 4-stroke, liquid-cooled |
| Bore | 78 mm |
| Stroke | 52.3 mm |
| Displacement | 249.3 cc |
| Compression Ratio | 14.4:1 |
| Valve Train | DOHC finger-type rocker arms / 4 valves |
| Starter | Electric starter |
| ACG | Mitsuba |
| Spark Plug | NGK LMAR9AI-8 |
| Lubrication | 2 oil pumps |
| Throttle Body | Ø 46 mm |
| Clutch | Multiple disks in an oil bath |
| Primary Drive | Z.23/72 |
| Transmission | 5 gears |
| Final Transmission | Chain |
| Engine Oil | SAE 10W/50 1 l |Claude Opus 4.8 works be
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