2025 Beta RX 450
QLD • Dealer new bike in stock
10
CategoryMotocross 4 Stroke
Engine Size449cc 4 stroke
Comments from the dealer
Most affordable 450 motocross bike on the market here in Rocky at R0senberg's
The development of the 450cc engine focused on delivering a significant performance increase over the previous model, with a stronger, more usable torque curve across all riding conditions. This achievement was possible due to a new cylinder head with a performance-enhancing piston, 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 air circulation inside the engine. The new manifold, following the flow line, has a longer internal horn to improve the tuning of pressure waves, and thus increasing volume while intaking air. The piston includes new coatings to reduce friction and improve its performance. A newly designed counter balancer was introduced to contain vibrations and reduce rider fatigue. The RX 450 4T also features a new HGS exhaust system, co-developed with HGS to create greater flow and increased power. Engine maps have been reworked for the new motor, with new start-up and limiter strategies. The RX 450 has four throttle pulleys so riders can tailor the throttle 2026 RX models share the following upgraded features, ensuring consistency in quality and performance:
The frame now features a cast-in brace to further strengthen the frame around the steering neck area,increasing stiffness.
Featuring graphics with a modern race look, simple yet bold, the final touch to the Italian RX range.
Radiators are structurally strengthened to prevent deformation, even during heavy use.
Aluminium subframe offering light, yet stiff structure with the rigidity to overcome the demands of motocross.
Kayaba 48mm forks and 50mm shock, calibrated specifically for MX applications.
Access to the air filter remains unchanged and is tool free. Kayaba 48mm forks and 50mm shock, calibrated specifically for MX applications.
Nissin brakes with Galfer discs (260mm front / 240mm rear) for powerful, modular braking.
Xtrig Flexfit handlebar mounts for enhanced comfort and vibration dampening.
Electric start with lithium battery, lighter and a must for quick starts.
Non o-ring chain, lighter and smoother.
Two engine maps (wet/dry) on all models, with the RX 450 4T also offering four levels of Traction Control.
The RX 450 is delivered with 4 different pulleys to customise the throttle response.
Bike details
øNetwork Id
OAG-AD-25785186
Bike
Motocross Manual 5sp 450cc (4T)
Body
Motocross 4 Stroke
Colour
Red
Engine Capacity
449 cc
Configuration
Single cylinder, 4-stroke, liquid-cooled
Country of Origin
ITALY
Stock Number
00001
Details
Bike Type
Motocross
Series
RX
Colours
Beta Red/Blue
Ride Away Price
True
OEM Ride Away Price
15295
Country of Origin
ITALY
Grey Import
False
Is Limited Edition
False
Engine
Engine Description
450
Engine Config
Single
Engine Capacity
449cc
Engine Type
Piston
Engine Stroke
4
Bore
97.0mm
Stroke
60.8mm
Cam Type
DOHC (Double Over Head Cam)
Cylinders
1
Valves Per Cylinder
4
Compression Ratio
13.4:1
Induction System
Aspirated
Carburettor
Elldor dual electronic injection
Throttle Bore
46mm
Lubrication
Wet Sump
Oil Capacity
0.8L
Exhaust Config
1 Into 1
Exhaust Description
Steel/Aluminium system
Electric Power
Electric Hub Motor
Not Available
Start
Ignition
CDI (Capacitive Discharge Ignition)
Ignition Description
AC Kokusan - Digital CDI
Starter
Electric
Electrics
Charging Method
Alternator & Regulator-Rectifier
Spark Plug Description
NGK LKAR 8A-9
Fuel & Emissions
Fuel Type
Petrol
Fuel Tank Capacity
7.0L
Fuel Reserve Capacity
1.40L
Transmission
Drive Type
Chain
Gear Type
Manual
Gear Number
5
Gear Change Method
Left foot lever
Clutch Type
Wet, Multi-disc
Chassis & Suspension
Chassis Description
Molybdenum steel with double cradle split above the
exhaust port
Frame Material
Molybdenum steel
Frame Design
Double cradle; Split
Front Suspension
KYB AOS Closed Cartridge with adjustable compression & rebound
Front Suspension Travel
305.0mm
Rear Suspension
KYB 50mm body with adjustable rebound and high/low speed on compression adjustment (135mm stroke)
Rear Suspension Travel
300.0mm
Fork Diameter
48.0mm
Swingarm Type
Dual Sided
Steering Damper
Not Available
Brakes
Front Brake Description
Single wave disc; Floating caliper; Hydraulic
Front Brake Caliper(s)
Double Piston
Front Brake Diameter
260.00mm
Rear Brake Description
Single wave disc; Floating caliper; Hydraulic
Rear Brake Caliper(s)
Single Piston
Rear Brake Diameter
240.00mm
Wheels & Tyres
Wheel Type
Blue rims; Laced, 36 Spokes
Wheel Size Front
1.6x21"
Wheel Size Rear
2.15x19"
Rear Tyre
110/90-19"
Front Tyre
80/100-21"
Dimensions & Weights
Length
2170mm
Width
825mm
Height
1270mm
Wheelbase
1485mm
Ground Clearance
330.0mm
Dry Weight
104.5kg
Weight Distribution Front/Rear
Front 51.4 kg / Rear 53.1 kg
Seat Height
945mm
Seating Capacity
1
Safety & Security
Traction Control
Standard
Convenience
Seating Position
Upright
About this dealer
Location
Queensland
Member since
2026
Current ad listings
19
Get in touch with the dealer
Call the dealer
(07) 2150 1892
Bike code: 10021Expert bike reviews on Beta RX 450
ø Specifications have been sourced from Automotive Data Services Pty Ltd (Redbook) and are based on manufacturer standard features and specifications, some of which may require subscription. Actual features and specifications for this vehicle may differ. Please confirm these details with the seller.
‡ This is an estimated figure calculated with reference to ADR 81/02 and is made on the assumption the vehicle is at maximum factory fuel/energy capacity. It does not take into account factors such as individual driving habits, terrains and driving conditions which may vary depending on the driver and the vehicle.
Motor Dealer Licence: 1901870Phone: 07 2150 1892, Car Code: 1002
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