2025 Beta 450RX

Built for Any Moto, Ready for Every Gate.

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.

The power delivery was specifically designed to provide riders with a large amount of mid-range power delivery. This is due to the average rider spending 80% of their time in this power range.  The layout and balance of the engine along with the development of the chassis, to provide a moto package unlike no other with the combination of a very balanced chassis and enough power to rip up berms without tiring the rider out with abrupt power.

Updates for 2025:
»Updated front and rear suspension settings to help the fork stay up in the stroke while also providing better feel over the square chop
»Larger battery for higher output and quicker starting
»Different final ration with a 51T rear sprocket to help pull out of the corners harder
»Smaller and lighter front brake caliper from Nissin, improved feel and modulation
»Xtrig FlexFix handlebar mounts reduce vibration at the handlebar and raises the bar by 5mm overall
»New footpegs provide a better bite over the previous version
»Larger rear axle for more rigidity, now 22mm over last year’s 20mm
»Updated engine mapping for 2025

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