For the 2025 season, Beta is proud to release the details of the 300 RX updates to enhance its platform. Updates to the 300 include changes to the engine, chassis, and suspension. A new frame highlights the model, one that mimics that of its older 450 brother.
| ENGINE TYPE |
Beta Built single cylinder, 2-stroke, liquid cooled, with BPV power valve system and counter balancer, electric start with back-up kick starter sold as an option
|
| BORE | 72mm |
| STROKE | 72mm |
| DISPLACEMENT | 293.1cc |
| COMPRESSION RATIO | 13.3:1 |
| VALVE TRAIN |
Beta Progressive Valve (BPV)
|
| IGNITION |
AC-CDI Kokusan
|
| SPARK PLUG | NGK BR8ECM |
| LUBRICATION | Pre-Mix |
| FUEL SYSTEM |
Keihin PWK 38mm
|
| CLUTCH |
Wet Diaphragm-style
|
| TRANSMISSION | 5 Speed |
| FINAL DRIVE | O-ring chain |
| FRAME |
Molybdenum steel / Double Cradle w/ quick air filter access
|
| WHEELBASE | 58.6″ |
| SEAT HEIGHT | 37.2″ |
| GROUND CLEARANCE | 13.4″ |
| FOOTREST HEIGHT | 16.6″ |
| DRY WEIGHT | 219 lbs |
| FUEL TANK CAPACITY | 1.8 US Gallons |
| FRONT SUSPENSION |
48 mm KYB AOS Closed Cartridge with adjustable compression & rebound
|
| REAR SUSPENSION |
KYB 50 mm body with adjustable rebound and high/low speed on compression adjustment
|
| FRONT WHEEL TRAVEL | 12.0″ |
| 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 |
Michelin Starcross
|
| 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 SUPPORT.
|
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