Review – Key Features – Features & Benefits – Specifications
2027 Beta 450 RXF: ITALIAN PASSION IS ALIVE AND WELL.
Introducing the 2027 Beta 450 RXF…
Beyond Bold New Graphics, the development of the 450 RXF model focuses primarily on electronics and engine power delivery for the 2027 model year. Traction Control has been further refined to be more precise and easier to use. The two maps have been updated to make the most of the engine, and all controls are managed via a new integrated control panel. Rider can choose Dry or Wet and loamy track conditions with a push of a button. Like the new 250, the 450 RXF has added launch control and quick shift. When combined with the overall 450 engine package, this system will enable riders to perform at a higher level.
Also new is the tapered 42mm throttle body. This new component comes straight from the AMA Supercross team and the MXGP team in Europe. It increases air speed and volume to the motor, enhancing low- to mid-range power overall and delivering a quicker throttle response across the board.
The 2027 250 RXF is all-new from the ground up. The engine is a dual overhead cam with a piston design that came straight from F1 technology. Featuring electric start and dual-injector fuel injection, the power output is extremely competitive straight out of the box. This new power plant was designed and manufactured in Florence, Italy, in-house, ensuring the Italian passion is alive and well.
In terms of performance, the new engine ranks among the best in its class, thanks in part to sophisticated features: dual-injection system with injectors positioned on the 48mm – 44mm Tapered throttle body and inside the airbox. This configuration allows optimal management of the air-fuel mixture across the entire RPM range, improving response at low revs while ensuring strong, usable power delivery at high revs. The exhaust system developed by Beta engineers and HGS features a system that enhances performance while remaining lightweight and durable.
The 250 RXF benefits from a frame designed to meet the specific needs of a 250F size and feel. Compared to the central engine connection solution used on its big brother model, the design features side-mounted engine head mounts: an engineering choice that increases torsional stiffness while maintaining greater vertical flexibility. The result is a new balance between cornering precision and suspension performance, with significant benefits in traction and stability.
Completing the entire package is the tried-and-true suspension system, KYB front fork and rear shock, valved with specific settings developed to suit the lighter weight of the rider and bike. KYB suspension is the industry leader in Supercross and Motocross and was the only choice for the new 250 RXF.
With its all-new, high-output engine, precision-tuned chassis, and industry-leading suspension, the 2027 250 RXF isn’t just built to compete—it’s engineered to set a new benchmark for what a 250cc four-stroke can do.
2027 Beta 450 RXF Totalmotorcycle.com Key Features
2027 RX Models
An All-New 250 RXF 4-Stroke Enters the Game
History continues to be made with the introduction of the all-new Beta 250 RXF four-stroke! The motocross lineup has grown to include this new model, along with the existing line. This new 250RXF joins the very successful 450 RXF (Formerly 450 RX) as well as the 250 and 350 RX two strokes.
Since the launch of the RX range, specifically designed for motocross, the 250 RXF has undergone rapid, continuous evolution to create a competitive model that shares Beta’s trademark RideAbility experience. This is to create a motorcycle that is easier to ride than the competition by providing better power delivery as well as a chassis balance like no other. A Beta must be ridden to understand this feeling.
The 2027 250 RXF is all-new from the ground up. The engine is a dual-overhead cam with a piston design that came straight from F1 technology. Featuring electric start and dual-injector fuel injection, the power output is extremely competitive straight out of the box. This new power plant was designed and manufactured in Florence, Italy, in-house, ensuring the Italian passion is alive and well.
The dry weight of the model is right at 222.6 lbs, which is one of the lightest in the class. The frame design is very compact; the lower frame tubes are contoured around the engine, which gives the bike a smaller-than-it-looks appearance.
The 2027 450 RXF returns to the lineup with an updated electronic package, including a launch control and quick shifter. This adds to the traction control and dual-map settings found on the prior model. To improve power output, a new tapered throttle body has been added, providing better pull out of corners and a broader midrange “sweet spot.”
In the 2-stroke world, Beta leads the way with a class-leading big bore 350 RX, aka Kingpin. The 350 RX is becoming the most popular 2-stroke at the track. 2026 models sold out early, which proves that 2-stroke MXers are still alive and well! If a high-revving 2-stroke is more your flavor, Beta offers the 250 RX. This model is known for excellent handling, a factory-like exhaust note, and a fun factor that many riders have been missing.
Also new for 2027 is the Beta Rippers program for amateur racers. This program has been in testing for three years and is ready to come out swinging in 2027, offering amateur riders a platform to build their off-road or Moto careers. Beta Rippers information will be released on July 4th during the Red Bud National.
2027 Beta 450 RXF Totalmotorcycle.com Features and Benefits
CONTROLS
Features 5 adjustable levels to manage torque delivery off the line. It maximizes traction immediately, preventing stalling or unwanted wheelies, perfect for occasional trips to the motocross track.
NISSIN BRAKING SYSTEM
Equipped with a compact, lightweight, motocross-derived Nissin front brake setup that offers immense stopping power with excellent lever modulation.
CHROMOLY STEEL FRAME
Celebrated for its natural flex, the chromoly frame absorbs harsh energy that aluminum frames transfer directly to the rider, providing immediate confidence through high-speed rollers
SOFTER COMPOUND GRIPS
New, softer grips reduce rider fatigue and arm pump by absorbing trail vibration, allowing you to stay on the gas longer.
FACTORY GRAPHICS
Eye-catching red and black livery conveys an aggressive and contemporary image to accompany the launch of the 250 4-stroke
KYB SUSPENSION
The 48mm closed-cartridge front fork and 50mm rear shock offer industry-leading predictability, giving the rider maximum bottoming resistance on massive jumps while remaining plush over small acceleration bumps.
HEAVY DUTY CHAIN GUIDE
Features a reinforced structure to withstand mud, rocks, and hard impacts from ruts and logs. A straighter, stronger guide ensures final drive stability, prevents thrown chains, and protects the swingarm.
FLEXFIX HANDLEBAR MOUNTS
Handlebar risers utilize silent-block rubber mounts to isolate the rider’s hands from engine vibration.
DUNLOP GEOMAX MX 34 TIRES
Next-generation Dunlop tires significantly improve cornering bite while shedding unsprung weight, allowing the suspension to react faster to acceleration bumps and square-edge chop.
2027 Beta 450 RXF – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $10,990 USD
Canada MSRP Price: $ See Dealer CAD
Europe/UK MSRP Price: £ See Dealer GBP (On The Road inc 20% Vat)
Type
Single cylinder, 4 –stroke, liquid cooled, 4-valve (Titanium intake and exhaust), electric start.
Frame
Molybdenum steel / Double Cradle w/ quick air filter access
Wheelbase
58.0″
Seat Height
37.2″
Bore
97mm
Ground Clearance
13.2″
Stroke
60.8mm
Footrest Height
16.6″
Displacement
449.3cc
Dry Weight
230.4 lbs (dry weight, no fuel)
Compression Ratio
13.5:1
Fuel Tank Capacity
1.85 US Gallons
Valve Train
DOHC finger followers / 4 valves
Front Suspension
48 mm KYB AOS closed cartridge fork, adjustable compression & rebound
Ignition
Mitsuba
Spark Plug
NGK LKAR 8A-9
Rear Suspension
KYB 50mm body with linkage, adjustable rebound, and high/low speed on compression adjustment
Lubrication
Twin Oil Pumps w/ Cartridge Filter & Separate Compartments For Engine & Transmission
Fuel System
EFI with Dual Injectors
Front Wheel Travel
12.0″
Electronical
Launch Control, Traction Control, & Quick Shift
Rear Wheel Travel
11.8″
Clutch
Wet Diaphragm Style
Front Brake
260 mm floating rotor
Transmission
5 Speed
Rear Brake
240 mm rotor
Final Drive
O-ring chain
Front/Rear Rim
80/100 – 21″ (Front) 110/90 – 19″ (Rear)
Tire
Dunlop Geomax MX 34
MSRP
$10,990.00
Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).
