27 July. Monday 2026
Beta RR X Pro 4T 390 - 2025 Specifications and Reviews
The 2025 Beta RR X Pro 4T 390 is a lightweight, nimble off-road machine designed for riders seeking sharp handling and aggressive trail performance. Known for its compact dimensions, responsive single-cylinder engine, and impressive ground clearance, this bike excels in technical terrain and enduro disciplines where agility and precision matter most.
2025
General information | |
| Color Options | Red/blue/white |
| Price | US$ 10399. MSRP depends on country, taxes, accessories, etc. |
| Category | Enduro / offroad |
| Model | Beta RR X-Pro 4T 390 |
| | |
Engine and Transmission Specifications | |
| Starting | Electric |
| Emission | 76.6 CO2 g/km. (CO2 - Carbon dioxide emission) |
| Fuel Consumption | 3.30 litres/100 km (30.3 km/l or 71.28 mpg) |
| Clutch | Wet multi-disc |
| Final Drive | Chain (final drive) |
| Gearbox | 6-speed |
| Cooling System | Liquid |
| Ignition | Kokusan |
| Fuel Control | Double Overhead Cams/Twin Cam (DOHC) |
| Induction | Injection. Synerject dual electronic injection |
| Valves Per Cylinder | 4 |
| Bore x Stroke | 88.0 x 63.4 mm (3.5 x 2.5 inches) |
| Compression Ratio | 12.5:1 |
| Engine Details | Titanium valves |
| Capacity: | 385.6 ccm (23.53 cubic inches) |
Physical measures and capacities | |
| Fuel Capacity | 9.00 litres (2.38 US gallons) |
| Wheelbase | 1490 mm (58.7 inches) |
| Ground Clearance | 315 mm (12.4 inches) |
| Overall Width | 830 mm (32.7 inches) |
| Overall Length | 2180 mm (85.8 inches) |
| Overall Height | 1270 mm (50.0 inches) |
| Seat Height | 940 mm (37.0 inches) If adjustable, lowest setting. |
| Dry Weight | 107.5 kg (237.0 pounds) |
Beta RR X Pro 4T 390 dimensions and frame | |
| Rear Brakes | Single disc. 1-piston floating caliper |
| Brake Disc Diameter | 240 mm (9.4 inches) |
| Front Brakes | Single disc. 2-piston floating calipers |
| Rear Tyre | 140/80-18 |
| Front Tyre | 90/90-21 |
| Rear Wheel Travel | 290 mm (11.4 inches) |
| Rear Suspension | KYB monoshock with progressive compound lever |
| Front Wheel Travel | 295 mm (11.6 inches) |
| Front Suspension | KYB hydraulic USD fork with 48mm shaft |
| Frame | Molybdenum steel with double cradle split above the exhaust port |
| | |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Spark plugs | NGK LKAR 8A-9 |
| Coolant | 1.00 litres (0.26 US gallons) |
| Engine oil | SAE 10W/45 |
| Update specs | Report missing specs or required updates. |
| Comments | Traction control. |
| Oil capacity | 1.60 litres (1.69 US quarts) |
| Reserve fuel capacity | 2.30 litres (0.61 US gallons) |
| Lubrication system | 2 oil pumps |
| Engine type | Single cylinder, four-stroke |
| Year | 2025 |
Performance Profile & Rider Fit
Best For
Track35%
City25%
Cornering70%
Daily Riding20%
Touring20%
Passenger5%
Rider Profile
| Best For | This is a serious enduro machine best suited to intermediate-to-advanced off-road riders who already understand technical trail riding and tall, light dirt bikes. |
| Purpose | Built for competitive and recreational enduro use, this bike is designed to attack tight trails, roots, rocks, and technical terrain rather than pavement. |
| Rider Fit | With a tall 940mm seat height and a very light dry weight around 107.5kg, it demands rider fitness and confidence but rewards with an extremely nimble, flickable feel. |
| Character | The high-compression, DOHC titanium-valve single with traction control gives a peaky, responsive, race-bred character that thrives at higher revs on loose surfaces. |
| Not Ideal For | This is not a good fit for new riders, commuters, or anyone wanting a comfortable, low-effort street or touring bike. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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