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• 2025 Beta RX300 Motocross / Cross Country - In stock & Ready to ride today
• With the Model year 2025, RX 300 underwent a series of important interventions to the engine and to the suspension and frame, which totally break away from the Enduro world and, like RX 450, configure a standalone project, completely dedicated to Motocross.
• Rear sub-frame and filter box: in line with the use of the new frame, the new RX 300 inherits its older sister’s aluminium sub-frame, as well as the filter box.
• Fork: the Kayaba fork with 48 mm stems has greater travel than Enduro models, and receives a new calibration that recreates the perfect set-up together with the new single shock, ensuring a stable, fast and precise bike, yet always easy and precise in its response.
• Single shock: the single shock is a new addition to this model, and, as for the 450, it switches to a 50 mm piston that allows greater support in jump landing, thanks to greater hydraulic braking, and guarantees constant performance with heavy use, where temperatures are on the rise.
• Braking system: Nissin with floating calipers and 260 mm discs at the front and 240 mm at the rear. Particularly at the front, the new caliper – inherited from its older sister – stands out; smaller, lighter and better performing than the previous one, it ensures a much better performance when letting off the throttle at the limit. At the rear, the new pump, featured for the first time on Enduro racing models, is characterised by greater braking power and greater modularity, as well as a different attachment to the frame.
• Radiators: RX 450 also gives the new 300 2T its radiators, redesigned at the top compared to the previous model to have a better steering angle and optimize the cooling liquid’s internal flow.
• Final ratio: the rear sprocket has 49 teeth, instead of 48, for lightning-fast accelerations!
• Plastic parts: while the front conveyors retain the same shape, the rear features a new, sleek and aggressive tail section that, not being a load-bearing element, engages in the new aluminium frame. The smaller plastic tank for the RX 300 now has a capacity of about 7lt.
• Chain: the chain without o-ring is lighter and smoother than the previous one; all details that matter to make a difference on the track!
• Engine and exhaust: if the bike is completely new suspension and frame-wise, the new engine features are even more game- changing, and bring the performance of the RX 300 to the top of its class. The totally new engine consists of a new cylinder with more exhaust and injection timing, a new head with greater compression, and modified intake crankcases to increase ventilation. The result of this intervention is a power unit with a significantly higher thrust than in the past, which still maintains the exceptional thrust at low speeds that has always distinguished Beta’s 300 2T, despite the peak maximum power at high speeds being higher, as needed on a motocross track. The greater power of the engine is transmitted to the rear wheel by a totally redesigned 5- speed gearbox, with a specific gear spacing for MX use, and by a stiffer spring that preloads the clutch pack more to prevent slippage. This new ensemble has been perfectly tuned by dedicated mappings, new carburettor calibrations (Keihin PWK 38), and several springs on the appropriately adjusted exhaust valve. The exhaust system, also completely redesigned, offers a dedicated expansion and a short silencer, in full Motocross style. In addition to this, there are a series of updates common to the two models, such as:
• Footpegs: the 2025 model receives new, less bulky footpegs, with an enhanced grip performance provided to the rider’s boot, to keep the bike under control at all times.
• The RX is delivered with customised kickstand and 4 different throttle pulleys, to customise the accelerator response.
• - £8695.00 (£7245.83 + VAT) - Unbelievable Bike For All Round Riding - Finance available subject to status - Nationwide next-day delivery available from £85 + VAT - All part exchanges considered - Official Beta Dealer - Over 55 Years Of Off-road Experience