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Beta RR X-PRO 4T 390 MY 2026

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Overview

“Ride like a X-PRO”: introduced last year, the new made-in-Beta way to enjoy Enduro was a hit among riders of all levels. With MY26, X-PRO becomes even more appealing with updates that make a difference. 

Expert users appreciated its universal feel, which makes the X-PRO the perfect companion to move from a  fast track to a Hard Enduro single track, with adaptable frame and the option of adjusting the suspension  settings with a few simple clicks. While amateurs appreciated the ease of use and feeling of feeling safe  knowing the X-PRO models are designed for challenging riding while providing a comfortable ride. 

With the frame features introduced in the Model Year 2025, X-PRO models handling has been improved even  more with the ability to customize the suspension and engine settings. The engine was also massaged  improving the power delivery which will appeal to the amateur and expert riders. So, without further ado,  let’s see the new RR X-PRO My26.

As always, the range is made up of 8 different models, each with its own personality, to cater for the needs  of a very diverse spectrum of riders. There’s the perfect X-PRO for every rider, but what every model has in  common is an ability to instil confidence in the user and offer a genuinely rewarding riding experience.

350CC

The most manageable  bike in the four-stroke  range; it favours riding  at high rpms while   maintaining very progressive power delivery. Due to the reduced reciprocating  mass, this is the lightest  feeling 4 stroke in the  range.

390CC

It represents the ideal  mix of handling and power, with exceptional  traction as its secret weapon. The light weight feel of the 350  yet with added torque.

430CC

A high-performance  engine which gives its  best when using high  gears and its impressive  torque. The closest thing to off road 4 stroke perfection.

480CC

It is the bike which is at  its best in large spaces.  It has very similar characteristics to the  430, but with even higher torque and power, ideal for the more experienced riders.

Updates are as follows:

  • Frame: the adoption of a frame with increased main spar section (+ 1cm) – initially mounted on X PRO My 25 models, returns for My 26, to keep the motorcycle’s overall weight distribution balanced  while at the same time offering stability. The larger frame also provides the right amount of flex for  excellent turning in and out of corners which is need for both single-track and Hard Enduro
  • Suspension: the new ZF suspension introduced on RR X-PRO in 2025, provides the rider with  confidence along with a feeling of comfort. The seat height remains at 930 mm (20 mm less than RR  Race) providing the rider with a planted feeling in almost every situation from amateur outings to  track riding, even in the most extreme conditions. 
  • SHC (Single Hydraulic Chamber) fork: Introduced to optimise hydraulic operation and  reduce the overall weight (by about 250g). The division of work between the right and left  leg allows for greater control over all settings, with the right leg managing the elastic  operation, and the left leg dealing with hydraulics. Both stanchions and their functions have  been updated. In particular, the spring guide was completely redesigned to improve the oil  flow (required to lubricate the mechanical components), and prevent pressure increases at  high speed that affected the component sliding performance. This resulted in a more linear  response and predictable behaviour, regardless of the type of obstacle encountered. This  single chamber design allows for the fork to respond in a “free” way, quicker than most forks  which provides a smoother ride overall.  
  • Swingarm: the rear wheel axle diameter has been increased 2mm, for a total of 22mm. This new  component guarantees greater stiffness and torsional resistance, resulting in better performance  when the rear wheel is flexing or in heavy turns.  
  • Handlebar mounts: Xtrig Flexfix mount system provides an anti-vibration block in between the  handlebar and the lower mount which translates into a vibration reduction. This system can be also  fitted with optional inserts that are softer for a custom feeling for each rider. 
  • Front recovery strap: to highlight the Extreme character of RR X-PRO, a new Beta-customized front  tow strap – very useful for getting out of the most challenging situations – has been introduced.
  • Handlebar map switch: the map switch button, placed on the handlebar for the first time last year,  is confirmed in the same position, just as in Beta’s MX models, inside the handlebar pad.

Other Features:

  •  Nissin brake pump: shared from the 450 RX, the X-PRO My26 feature a new front brake calliper.  Smaller, lighter and more performing than its forerunner, it ensures a better feeling and modulation.
  • Radiators: to prevent any loss of reliability, even in the most extreme situations, the cooling system  must always be in perfect operating condition. This is why, apart from confirming the 200cc coolant  expansion tank inside the frame, the new model years will feature new, sturdier radiators, to prevent  deformations and consequent reductions in the coolant flow. 
  • Battery: 4T models will have a new, lighter, more-performing battery, for safer starts under any  usage conditions. 
  • Graphics: the model’s bold personality wears a new full-red guise, with contrasting black graphics,  for a modern and sporty contemporary style. 
  • Tail light: X-PRO takes a further step in style, with the new LED taillight, more modern and sturdier  than the previous model. 

Engine maps: 4-stroke engines received new maps to improve their delivery along the entire range. Whatever  the displacement, Beta engineers improved their linearity and usability, to better manage the power  available, at any speed.

Specifications
Model
RR X-PRO
Category Name
Motorcycles
Year
2026
Sale Type
New
Manufacturer
Beta Motorcycles
special components

Beta RR X PRO 4T 390 MY 2026SHC (Single Hydraulic Chamber) fork

The division of work between the right and left leg, introduced to optimise hydraulic operation and reduce the overall weight (by about 250g).

Beta RR X PRO 4T 390 MY 2026Handlebar map switch

The map switch button, placed on the handlebar for the first time last year, is confirmed in the same position, just as in Beta’s MX models, inside the handlebar pad.

Beta RR X PRO 4T 390 MY 2026XPRO Mono

This resulted in a more linear response and predictable behaviour, regardless of the type of obstacle encountered. This single chamber design allows for the fork to respond in a “free” way, quicker than most forks which provides a smoother ride overall.

Beta RR X PRO 4T 390 MY 2026Nissin brake pump

Shared from the 450 RX, the X-PRO My26 feature a new front brake calliper. Smaller, lighter and more performing than its forerunner, it ensures a better feeling and modulation.

Beta RR X PRO 4T 390 MY 2026Graphics

The model’s bold personality wears a new full-red guise, with contrasting black graphics,for a modern and sporty contemporary style.

Beta RR X PRO 4T 390 MY 2026Front recovery strap

To highlight the Extreme character of RR X-PRO, a new Beta-customized front tow strap very useful for getting out of the most challenging situations has been introduced.

Beta RR X PRO 4T 390 MY 2026Silent block

Silent blocks help reduce vibrations transmitted to the rider, making gripping more comfortable and less tiring.

Beta RR X PRO 4T 390 MY 2026Coolant Recovery Tank

The coolant expansion tank, of about 200cc, makes it possible to recover water that might be expelled from the radiator as temperatures rise, particularly in slower and more technical use of the vehicle, or in extreme enduro rides.

 

chassis
Frame
Molybdenum steel with double cradle split above the exhaust port
Reserve
2,3 l
Rear Rim
18 x 2,15 – 36 holes
Front Rim
21 x 1,6 – 36 holes
Max Width
830 mm
Rear Tyre
140/80 – 18
Wheelbase
1482 mm
Dry Weight
107,5 kg (front 52,7 kg; rear 54,8 kg)
Front Tyre
90/90 – 21
Max Height
1270 mm
Max Length
2180 mm
Rear Brake
Wave disc ø240 mm and single-piston floating caliper
Front Brake
Wave disc ø260 mm and double-piston floating caliper
Seat Height
930 mm
Footrest Height
407 mm
Rear Suspension
Monoshock with progressive compound lever
Front Suspension
Hydraulic USD fork with ø 48 mm shaft
Ground Clearance
325 mm
Rear Wheel Travel
290 mm
Front Wheel Travel
295 mm
Fuel Tank Capacity
9,0 l
Shock Absorber Stroke
132 mm
Cooling System Capacity
1,4 l
engine
ACG
Kokusan
Bore
88 mm
Type
Single cylinder, 2-stroke, liquid-cooled
Clutch
wet multi-disc clutch
Stroke
63,4 mm
Starter
Electric
Engine Oil
SAE 10W/50 0,8 l. + SAE 10W/40 0,8 l.
Spark Plug
NGK LKAR 8A-9
Lubrication
2 oil pumps
Valve Train
DOHC finger follower / 4 titanium valve
Displacement
385,6 cc
Transmission
6 gears
Primary Drive
Z.28/76
Throttle Body
Ø 42 mm – Synerject
Compression Ratio
12,48:1
Final Transmission
chain
Consumption L/100 Km
3,3
Pollution Co2 [g/km]
79
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