28 July. Tuesday 2026
Beta RR X Pro 4T 390 - 2026 Specifications and Reviews
The Beta RR X-Pro 4T 390 is a lightweight enduro machine designed for serious off-road riders seeking technical trail performance. Its 385cc four-stroke engine delivers responsive power with advanced fuel injection and liquid cooling, while titanium valves and dual overhead cams ensure durability. Best suited for competitive enduro enthusiasts and adventure riders tackling challenging terrain.
2026
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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