Overview
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2025 Beta RX450

Motorcycle

450 RX

The 2025 Beta 450 RX is in its second year of production. 2024 was a remarkable year for the bike as it earned two top-ten AMA Supercross finishes. Our slogan “Rideability” spills over into the MX category as it truly points out the real strength of a Beta. Others are focused 90% on building a race bike that is sold to the average rider. Beta takes pride in designing a motorcycle that appeals to the “common” rider.


 

Starting at $10,999 MSRP

Specs and Features

Specifications
ENGINE TYPE
Single cylinder, 4 –stroke, liquid cooled, 4-valve with electric start.
BORE
97mm
STROKE
60.8mm
DISPLACEMENT
449.3cc
COMPRESSION RATIO
13.5:1
VALVE TRAIN
Finger followers w/ shim adjustment
IGNITION
Dual-Map Kokusan with Traction Control
SPARK PLUG
NGK LKAR8A-9
LUBRICATION
Twin Oil Pumps w/Cartridge Filter & Separate Compartments For Engine & Transmission
FUEL SYSTEM
46mm Throttle Body
CLUTCH
Hydraulic, adjustable diaphragm multi-plate clutch
TRANSMISSION
5 Speed
FINAL DRIVE
DID drive chain
FRAME
Molybdenum steel / Double Cradle w/ push button seat and quick air filter access
WHEELBASE
58.4"
SEAT HEIGHT
37.2"
GROUND CLEARANCE
13"
FOOTREST HEIGHT
16.1"
DRY WEIGHT
229 lbs
FUEL TANK CAPACITY
1.8 US Gallons
FRONT SUSPENSION
48 mm KYB AOS closed cartridge fork, adjustable compression & rebound
REAR SUSPENSION
KYB 50mm body with adjustable rebound and high/low speed on compression adjustment
FRONT WHEEL TRAVEL
12"
REAR WHEEL TRAVEL
11.8"
FRONT BRAKE
260 mm floating rotor
REAR BRAKE
240 mm rotor
FRONT/REAR RIM
21" (Front) 19" (Rear)
FRONT/REAR TIRE
Maxxis
SPECS
*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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