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450 RX

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In 2024, Beta launched the 450 RX model that would show off the talents of the engineering team based in Florence, Italy. The 450 RX 4 stroke had been tested in the prestigious MXGP class for more than three years as a factory prototype model. The production version of this prototype was very well received by riders as well as the media. The 2025 RX model continues the Beta Rideability mission in Motocross.  Rideability is the smoothness, ease of handling, and overall comfort experienced on a Beta Motorcycle.  It encompasses factors such as throttle response, suspension performance, ergonomic design, and stability all contributing to a seamless and enjoyable riding experience.  Rideability is the perfect balance of power and agility that provides riders with confidence inspiring control and effortless maneuverability, resulting in a gratifying ride, no matter the conditions.

The 2025 450 RX model received updates bringing it closer to perfection than ever. Updates to sharpen the model’s weapons, ready to do battle on MX tracks throughout the USA. An even-stronger rear aluminum subframe, suspension upgrades, as well as a more powerful lithium battery are just a few.  

Features: Updated rear subframe that has been reinforced to add stiffness and strength in key areas, updated valving in the rear shock for better overall performance, new lithium battery to ensure quick starts, 51 tooth rear sprocket for quicker spin-up of the power delivery, XTrig FlexFix handlebar mounts, larger rear axle diameter to reduce flex and provide better durability, five speed transmission, upgraded footpegs with enhanced grip and less bulk, updated engine mapping with latest setting tested by Beta race team, MAP switch and tractional control to adjust power delivery, three throttle pulleys with different ratios come standard with the 450 RX to allow riders to configure settings to their liking, electric starter, and easy access air filter box.

 

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ENGINE TYPE
BORE
STROKE
DISPLACEMENT
COMPRESSION RATIO
VALVE TRAIN
IGNITION
SPARK PLUG
LUBRICATION
FUEL SYSTEM
CLUTCH
TRANSMISSION
FINAL DRIVE
FRAME
WHEELBASE
SEAT HEIGHT
GROUND CLEARANCE
FOOTREST HEIGHT
DRY WEIGHT
FUEL TANK CAPACITY
FRONT SUSPENSION
REAR SUSPENSION
FRONT WHEEL TRAVEL
REAR WHEEL TRAVEL
FRONT BRAKE
REAR BRAKE
FRONT/REAR RIM
FRONT/REAR TIRE
SPECS


450 RX
Single cylinder, 4 –stroke, liquid cooled, 4-valve with electric start.
97mm
60.8mm
449.3cc
13.5:1
Finger followers w/ shim adjustment
Dual-Map Kokusan with Traction Control
NGK LKAR8A-9
Twin Oil Pumps w/Cartridge Filter & Separate Compartments For Engine & Transmission
46mm Throttle Body
Hydraulic, adjustable diaphragm multi-plate clutch
5 Speed
DID drive chain
Molybdenum steel / Double Cradle w/ push button seat and quick air filter access
58.4"
37.2"
13"
16.1"
229 lbs
1.8 US Gallons
48 mm KYB AOS closed cartridge fork, adjustable compression & rebound
KYB 50mm body with adjustable rebound and high/low speed on compression adjustment
12"
11.8"
260 mm floating rotor
240 mm rotor
21" (Front) 19" (Rear)
Maxxis
*Specifications subject to change without notice Additional information on all models including manuals, accessories, and
parts books are available online at www.betausa.com under the support tab
**This model is for competition use only

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