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The values presented on this site are for estimation purposes only. Your actual payment may vary based on several factors such as down payment, credit history, final price, available promotional programs and incentives. Applicable tag, title, destination charges, taxes and other fees and incentives are not included in this estimate.

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2025 Beta 300 RX

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  • New
  • In Stock
  • Banning
  • E50078
  • ZD3E7M971S0350726
  • Motorcycle / Scooter
  • Off-Road
  • Gas

2025 Beta 300 RX

Beta USA entered the motocross world in 2021 with the introduction of their 300 RX, a 2-stroke model that provided a solid platform in design, handling, and looks. Along with the beauty of the bike, the “factory sound” of the 293cc motor was like no other. Riders quickly discovered what Beta likes to call Rideability. 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 ad 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.

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.

Features may include:

  • Engine

Updated Cylinder porting and matched cylinder head along with new ignition timing has increased the bike's overall power. The engine pulls harder and longer.

  • Frame

Dedicated for motocross use, Chro-moly with a larger backbone to increase stiffness while enhancing the turning. The new frame also has an updated mounting for the new rear brake master cylinder.

  • Exhaust

An updated expansion chamber attached to a shorter silencer specific for moto.

  • Banning
  • New
  • E50078
  • 2025
  • Beta
  • 300 RX
  • Motorcycle / Scooter
  • Off-Road
  • ZD3E7M971S0350726
  • Beta Built single cylinder, 2-stroke, with BPV power valve system and counter balancer, electric start with back-up kick starter sold as an option
  • Liquid Cooled
  • 293.1cc
  • 72mm
  • 72mm
  • 13.3:1
  • Pre-Mix
  • AC-CDI Kokusan
  • NGK BR8ECM
  • Beta Progressive Valve (BPV)
  • Keihin PWK 38mm
  • Wet Diaphragm-style
  • 5 Speed
  • O-ring chain
  • Molybdenum steel / Double Cradle w/ quick air filter access
  • Beta Progressive Valve (BPV)
  • 48 mm KYB AOS Closed Cartridge with adjustable compression & rebound
  • KYB 50 mm body with adjustable rebound and high/low speed on compression adjustment
  • 12.0"
  • 11.8"
  • 260 mm floating rotor
  • 240 mm rotor
  • Rim: 21"
  • Rim: 19"
  • Michelin Starcross
  • Michelin Starcross
  • 58.6"
  • 37.2"
  • 13.4"
  • Footrest: 16.6"
  • Tank: 1.8 US Gallons
  • 219 lbs

*Price, if shown, does not include government fees, registration, taxes, A.D.M., dealer document preparation charges, finance charges, or added accessories installed on the unit (if applicable). Final actual sales price will vary depending on options or accessories selected. A.D.M. includes but is not limited to inter-store transportation costs, assembly, servicing, dealer insurance, profit & overhead, flooring & other costs where applicable. All vehicles in this ad are subject to prior sale. All Current Manufacturer Promotions and Rebates are included in pricing. Offers expire when promotion ends OR when advertised vehicles are sold.

Warning WARNING: Operating, servicing and maintaining a passenger vehicle, an off-highway motor vehicle or a recreational marine vessel can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle or vessel in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle or vessel. For more information go to https://www.p65warnings.ca.gov/products/passenger-vehicle and https://www.p65warnings.ca.gov/products/marine.