RX Motocross Range
The Beta RX range is built for one purpose — motocross, pure and simple. No compromises for road use, no distractions — just lightweight, aggressive machines designed to perform on the track.
Available in both 2-stroke (RX 250 & RX 350) and 4-stroke (RX 450) platforms, the RX lineup brings Beta’s race-proven engineering into a dedicated motocross package. Sharp chassis geometry, responsive power delivery, and a premium KYB suspension setup combine to deliver precise handling, strong bottom-out resistance, and the control needed to push harder, lap after lap.
The 2-stroke models run premix by design, giving riders full control over fuel ratio and engine response — a preferred setup for those who want to dial in performance to suit their riding style and track conditions. The 4-stroke RX 450 delivers strong, tractable power with a broad spread of torque, making it incredibly effective across a wide range of track conditions.
Developed through Beta’s growing presence in international motocross competition, the RX range is focused, capable, and built to be ridden aggressively.
This is Beta at full attack — built for the gate drop, not the road.
RX 250 2T
Explosive, high-revving, and race-focused.
The RX 250 is built to compete in MX2-style conditions, delivering a sharp, aggressive powerband that rewards riders who like to stay on the pipe. It’s the most “racey” of the 2-strokes — light, responsive, and designed to be pushed.
Key Features
- All-new 250cc 2-stroke engine
- High-revving, explosive power delivery
- Single spark plug head (sharper, more aggressive character)
- Purpose-built motocross chassis with reinforced frame
- KYB 48mm closed-cartridge forks + KYB shock
- Lightweight aluminium subframe
- Dual engine maps (wet/dry)
- Wet weight: ~100 kg class
- Fuel capacity: ~7L
- Wheel size: 21” front / 19” rear
- Chromoly steel frame with reinforced steering head
- Aluminium subframe for strength + weight reduction
- Tool-free air filter access + quick-release seat
- Dual engine maps (wet/dry) on all models
- Premix 2-strokes (rider-controlled fuel setup)
- Lightweight, race-ready ergonomics
- Suspension travel: ~300mm front & rear
Best for: MX2 racing, aggressive riders, riders who like to rev
RX 350 2T
Big torque, smoother delivery — the wildcard.
The RX 350 is a unique offering — combining 2-stroke simplicity with a broader, more 4-stroke-like power delivery. It’s designed to be easier to ride fast, with strong torque and a more linear feel.
Key Features
- 351.7cc 2-stroke engine
- Dual-spark plug head for smoother, more complete combustion
- Longer stroke crankshaft for added torque
- Linear, tractable power delivery (less aggressive than 250)
- KYB 48mm fork + KYB shock tuned for stability and traction
- Reinforced radiators and race-ready cooling system
- Displacement: 351.7cc
- Wheelbase: 1482 mm
- Seat height: 945 mm
- Ground clearance: 340 mm
- Dry weight: ~100 kg
- Suspension travel: 305 mm front / 300 mm rear
- Chromoly steel frame with reinforced steering head
- Aluminium subframe for strength + weight reduction
- Tool-free air filter access + quick-release seat
- Dual engine maps (wet/dry) on all models
- Premix 2-strokes (rider-controlled fuel setup)
- Lightweight, race-ready ergonomics
Best for: riders wanting torque without 4T weight, varied track conditions, “ride fast with less effort”
RX 450 4T
Factory DNA, full motocross performance.
The RX 450 is Beta’s flagship motocross machine — developed directly from their MXGP and Supercross race programs. It delivers strong, usable power with modern electronics to help manage it.
Key Features
- 450cc 4-stroke engine with upgraded cylinder head and piston
- Improved intake and exhaust flow for stronger torque curve
- Traction control (multiple levels) + engine maps
- KYB suspension tuned for high-speed stability
- Redesigned exhaust system for performance and compliance
- Counterbalancer to reduce vibration and rider fatigue
- Class: 450cc MX1
- Fuel capacity: ~7L
- Seat height: ~940–950 mm range
- Wet weight: ~105 kg class
- Chromoly steel frame with reinforced steering head
- Aluminium subframe for strength + weight reduction
- Tool-free air filter access + quick-release seat
- Dual engine maps (wet/dry) on all models
- Premix 2-strokes (rider-controlled fuel setup)
- Lightweight, race-ready ergonomics
Best for: MX1 racing, experienced riders, high-speed tracks, riders who want torque and stability
Beta has unveiled its 2027 RX motocross range, headlined by the arrival of the all-new 250 RXF four-stroke.
Designed and manufactured in-house in Italy, the 250 RXF features a brand-new 249.3cc dual-overhead-cam engine with dual fuel injection, electric start and advanced Box-in-Box piston technology derived from Formula 1 engineering. Weighing just 101kg dry, it is one of the lightest bikes in its class and combines strong performance with Beta’s renowned RideAbility philosophy.
The new model joins the updated 450 RXF, which gains launch control, quick shift technology and a race-developed tapered throttle body for improved power delivery and throttle response.
Beta’s two-stroke lineup also returns for 2027 with the 250 RX and class-leading 350 RX. The 350 RX receives a new lightweight piston delivering a 1.5hp increase, while the 250 RX benefits from revised gearing to improve starts. Both models also feature a stronger muffler and Dunlop MX34 tyres.
Across the range, riders will find new graphics, an aluminium rear subframe, stronger chain guide, updated sprocket guard and softer Beta-branded grips.
With an all-new four-stroke platform and continued refinement across the lineup, the 2027 RX range represents Beta’s strongest motocross offering yet.
MY27 Beta RX Lineup
MY27 RX 250 2T
Explosive, high-revving, and race-focused.
The RX 250 is built to compete in MX2-style conditions, delivering a sharp, aggressive powerband that rewards riders who like to stay on the pipe. It’s the most “racey” of the 2-strokes — light, responsive, and designed to be pushed.
Key Features
- All-new 250cc 2-stroke engine
- High-revving, explosive power delivery
- Single spark plug head (sharper, more aggressive character)
- Purpose-built motocross chassis with reinforced frame
- KYB 48mm closed-cartridge forks + KYB shock
- Lightweight aluminium subframe
- Dual engine maps (wet/dry)
- Wet weight: ~100 kg class
- Fuel capacity: ~7L
- Wheel size: 21” front / 19” rear
- Chromoly steel frame with reinforced steering head
- Aluminium subframe for strength + weight reduction
- Tool-free air filter access + quick-release seat
- Dual engine maps (wet/dry) on all models
- Premix 2-strokes (rider-controlled fuel setup)
- Lightweight, race-ready ergonomics
- Suspension travel: ~300mm front & rear
Best for: MX2 racing, aggressive riders, riders who like to rev
RX 350 2T
Big torque, smoother delivery — the wildcard.
The RX 350 is a unique offering — combining 2-stroke simplicity with a broader, more 4-stroke-like power delivery. It’s designed to be easier to ride fast, with strong torque and a more linear feel.
Key Features
- 351.7cc 2-stroke engine
- Dual-spark plug head for smoother, more complete combustion
- Longer stroke crankshaft for added torque
- Linear, tractable power delivery (less aggressive than 250)
- KYB 48mm fork + KYB shock tuned for stability and traction
- Reinforced radiators and race-ready cooling system
- Displacement: 351.7cc
- Wheelbase: 1482 mm
- Seat height: 945 mm
- Ground clearance: 340 mm
- Dry weight: ~100 kg
- Suspension travel: 305 mm front / 300 mm rear
- Chromoly steel frame with reinforced steering head
- Aluminium subframe for strength + weight reduction
- Tool-free air filter access + quick-release seat
- Dual engine maps (wet/dry) on all models
- Premix 2-strokes (rider-controlled fuel setup)
- Lightweight, race-ready ergonomics
RXF 250 4T
All-new engine. All-new platform. Serious contender.
The MY27 RXF 250 marks a major step forward for Beta’s motocross program. Developed from the ground up as a dedicated 250 four-stroke motocross machine, it combines competitive performance with Beta’s renowned RideAbility philosophy — delivering power that’s fast, usable and easier to ride for longer.
Key Features
- All-new 249cc liquid-cooled 4-stroke engine
- Dual overhead camshaft (DOHC) design
- Advanced lightweight piston technology derived from Formula 1 development
- Dual-injector electronic fuel injection system
- Electric start as standard
- Lightweight, compact engine architecture
- Broad, linear power delivery designed for maximum traction
- KYB 48mm closed-cartridge fork
- KYB rear shock with race-focused settings
- Chromoly steel perimeter frame
- Aluminium subframe for reduced weight
- Reinforced cooling system for motocross racing conditions
- Tool-free air filter access and quick-release seat
- Dual engine maps (wet/dry)
Specifications
- Displacement: 249cc
- Engine Type: DOHC 4-stroke single-cylinder
- Fuel System: Dual-injector EFI
- Starting: Electric
- Wheelbase: 1490 mm
- Seat Height: 950 mm
- Ground Clearance: 350 mm
- Dry Weight: Approx. 104 kg
- Suspension Travel: 305 mm front / 300 mm rear
Best For
Riders wanting the latest four-stroke technology with a more manageable, confidence-inspiring character. Ideal for MX2 racing, club motocross and anyone looking for a competitive 250F that prioritises rideability as much as outright performance.
RXF 450 4T
Big power. Surprisingly manageable. Pure Beta RideAbility.
The RXF 450 has established itself as one of the easiest big-bore motocross bikes to ride fast. Rather than chasing aggressive peak power figures, Beta has focused on delivering strong, controllable performance that allows riders to use more of the engine more often. The result is a 450 that feels planted, predictable and incredibly effective in real-world racing conditions.
Key Features
- 449.3cc liquid-cooled 4-stroke engine
- Dual overhead camshaft (DOHC) design
- Electronic fuel injection
- Electric start as standard
- Broad torque curve with strong low and mid-range power
- Progressive, rider-friendly power delivery
- KYB 48mm closed-cartridge fork
- KYB rear shock tuned for motocross competition
- Chromoly steel perimeter frame
- Aluminium subframe for reduced weight
- Reinforced radiators and race-ready cooling package
- Tool-free air filter access and quick-release seat
- Dual engine maps (wet/dry)
- Lightweight race-focused ergonomics
Specifications
- Displacement: 449.3cc
- Engine Type: DOHC 4-stroke single-cylinder
- Fuel System: Electronic Fuel Injection (EFI)
- Starting: Electric
- Wheelbase: 1490 mm
- Seat Height: 950 mm
- Ground Clearance: 350 mm
- Dry Weight: Approx. 107 kg
- Suspension Travel: 305 mm front / 300 mm rear
Best For
Riders looking for maximum torque and effortless acceleration without the intimidating feel often associated with 450 motocross bikes. Ideal for experienced motocross racers, vet riders and anyone wanting a powerful machine that remains predictable and easy to ride deep into a moto.
