Take a look behind the scenes of our latest product launch.
Beta RX 450 4T 2027
More than just Bold New Graphics, the development of the RX 450F model focuses primarily on the electronics and engine power delivery for the 2027 model year. Traction Control has been further refined to be more precise and useable. 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 RX 250F, the RX 450F has added launch control and quick shift, combined with the overall 450 engine package, this system will allow riders to perform at a higher level.
Also new is the tapered 48mm - 44mm throttle body. This new component comes straight from the AMA Supercross team as well as the MXGP team in Europe. It provides increased air speed and volume to the motor which enhances the low-to-midrange power overall while providing a quicker throttle response across the board.
With its sophisticated electronic controls, race-proven throttle body, and perfectly balanced power delivery, the 2027 RX 450F is designed to elevate your ride and help you achieve a higher level of performance on every track.
- Engine maps: all the RX models are equipped with two specific engine maps (wet and dry), while the 4- Stroke model has also four levels of Traction Control (on/off/active with hard map/active with soft map) to manage the vehicle’s significant power in all terrain conditions. The button to select the map and TC is located on the handlebar bumpers. All RX will be supplied with personalized kickstand. In addition, the 4Str has four different throttle pulleys to customize the accelerator’s response.
- Handlebar silent block: Xtrig Flexfit bar mounts provide a comfortable grip on the handlebar for enhanced control and reduced vibration.
- Lithium battery: lighter and a must for quick starts.
- Chain: non o-ring, lighter and smoother.
- Nissin braking system: with floating callipers and 260mm Galfer discs at the front and 240mm at the rear, for powerful and modular braking.
- Kayaba suspensions: fork (48mm) and single shock (50mm) are specifically calibrated on the new range models, focusing on their rideability and stability when the pace rises. The resulting setting is enough to make any rider confident, from amateurs to professionals.
- Aluminium rear sub-frame and dedicated filter box: aluminium gives the right level of stiffness to the structure. Light, yet has the rigidity to overcome the demands of motocross. Access to the filter remains on the left side of the bike, and is extremely easy and intuitive, as well as being tool free. The push button seat also removes without tools.
- Frame: geometry remains unchanged, yet the frame now incorporates a cast-in brace to further strengthen the frame around the steering neck area. This increases the reliability and stiffness of the frame’s area most subject to stress.
- Radiators: their bearing structure was strengthened to prevent any deformation that might affect their operation, even during heavy-duty use.
- Graphics: a modern race look, simple yet bold, the final touch to the Italian RX range.
Exhaust system: the head-pipe has been redesigned to create a greater flow and to provide increasedpower. 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
- 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 allconditions. 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.
CHASSIS
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 :335 mm
Footrest height : 422 mm
Dry weight : 104,5 kg (front 48 kg; rear 52 kg)
Fuel tank capacity : 7,0 l
Cooling system capacity : 1,4 l
Front suspension : Hydraulic USD close cartridge fork with ø 48 mm shaft
Rear suspension : Monoshock with progressive compound lever
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 : 110/90 – 19
ENGINE
Type : Single cylinder, 4-stroke, liquid-cooled
Bore : 97 mm
Stroke : 60.8 mm
Displacement : 449,3
Compression ratio : 13.5
Valve train :DOHC finger follower / 4 valve, intake titanium, exhaust steel
Starter : Electric starter
ACG : Kokusan
Spark plug :NGK LKAR 8A-9
Lubrication : 2 oil pumps
Fuel system : Elldor electronic injection
Throttle body : Ø 46 mm
Clutch : wet multi-disc clutch
Primary drive : Z.31/72
Transmission : 5 gears
Final transmission : chain
Engine oil : SAE 10W/50 + SAE 10W/40 0,8 l.