The new 2025 Beta RR Racing 4T 390 Off-Road Motorcycle represents the all-time famous race-ready versions of Beta’s newly-introduced X-Pro models, with a series of modifications to the engine, frame and suspension. These features make it ideal for delivering the best performance on the track. The dirt bike is designed for both low- and high-speed courses. The Race models ensure that the rider gains the confidence and rideability that only Beta can deliver—the brief review of the 2025 Beta RR Racing 4T 390 Off-Road Motorcycle is below.
2025 Beta RR Racing 4T 390 Off-Road Motorcycle – Features and Specs
Engine Features
The new 2025 Beta RR Racing 4T 390 Off-Road Motorcycle features a powerful 385.6ccm, single-cylinder, liquid-cooled and four-stroke engine offering incredible riding pleasure. The 88mm bore and 63.4mm stroke ensure the rider gets the most out of the engine. The lubrication system features two oil pumps offering outstanding performance.
Also Read:Â 2025 Beta RR Racing 4T 350 Dirt Motorcycle Review
The brand-new electric starter ensures that the rider can easily start the motorcycle under all conditions. The transmission system contains 6-speed gearbox that delivers a smooth, seamless gear-shifting experience over time.
Chassis Features
The new 2025 Beta RR Racing 4T 390 Off-Road Motorcycle features strong molybdenum steel with a double cradle split above the exhaust port, offering greater stability throughout the ride. The motorcycle is available in attractive Red, Blue and white options. This dirt bike has a total fuel capacity of 9 litres, with a 1.60-litre reserve.
Also Read:Â Beta 2025 RR Racing 2T X-Pro 250 Dirt Bike Review
The suspension system features KYB hydraulic USD forks with 48mm shafts in the front and KYB monoshock with a progressive compound lever in the rear. The braking system features a single disc on both wheels, with 2-piston floating callipers in the front and 1-piston calliper in the rear.
2025 Beta RR Racing 4T 390 Off-Road Motorcycle – Technical Specifications
Engine and Transmission
| Engine size | 385.6 ccm (23.53 cubic inches) |
| Type of engine | Single cylinder, four-stroke |
| Engine details | Titanium valves |
| Compression | 12.5:1 |
| Bore x stroke | 88mm x 63.4mm (3.5 inches x 2.5 inches) |
| Valves per cylinder | 4 |
| Fuel system | Injection. Synerject dual electronic injection |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Ignition | Kokusan |
| Lubrication system | Two oil pumps |
| Cooling system | Liquid |
| Gearbox | 6-speed |
| Transmission type | Chain (final drive) |
| Clutch | Wet multi-disc |
| Fuel consumption | 3.89 litres/100 km (25.7 km/l or 60.47 mpg) |
| Greenhouse gases | 90.2 CO2 g/km. (CO2 – Carbon dioxide emission) |
Chassis, Suspension, Brakes and Wheels
| Frame type | Molybdenum steel with double cradle split above the exhaust port |
| Front suspension | KYB hydraulic USD fork with 48mm shaft |
| Front wheel travel | 295 mm (11.6 inches) |
| Rear suspension | KYB monoshock with progressive compound lever |
| Rear wheel travel | 290 mm (11.4 inches) |
| Front tyre | 90/90-21 |
| Rear tyre | 140/80-18 |
| Front brakes | Single disc. 2-piston floating callipers |
| Diameter | 260 mm (10.2 inches) |
| Rear brakes | Single disc. 1-piston floating calliper |
| Diameter | 240 mm (9.4 inches) |
Physical Measures and Capacities
| Dry weight | 107.5 kg (237.0 pounds) |
| Seat height | 950 mm (37.4 inches). If adjustable, lowest setting. |
| Overall height | 1270 mm (50.0 inches) |
| Overall length | 2180 mm (85.8 inches) |
| Overall width | 815 mm (32.1 inches) |
| Ground clearance | 320 mm (12.6 inches) |
| Wheelbase | 1490 mm (58.7 inches) |
| Fuel capacity | 9.00 litres (2.38 US gallons) |
| Reserve fuel capacity | 2.30 litres (0.61 US gallons) |
| Oil capacity | 1.60 litres (1.69 US quarts) |
Other specifications
| Colour options | Red/blue/white |
| Starter | Electric |
