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Beta Motorcycles 390 RR X-PRO 4-Stroke

Can-Am of North Georgia, Georgia

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2026 Single-Track Off Road

390 RR X-PRO 4-Stroke

Overview:

“Rideability”: a term that Beta USA founded in 2009, originated from the moto journalists while testing Beta’s different models, terms such as “I moved up a class”, and “It feels so planted” were common so the marketing team decided to own the phrase Rideability. The 2026 Beta X-Pro models are the perfect example of this term. Riders of all levels appreciate the feeling that a Beta provides the rider, the overall balance of the frame and engine placement provides something that must be felt only through riding a Beta. It will not take riders long to understand how well balanced the X-Pro models really are.

The Beta engineering team, based out of Florence, Italy continued throughout the Winter and Spring to further enhance the range, making small improvements here and there that ultimately improves the feeling even over the prior year.
With the new frame introduced on the 2025 models, X-PRO handling has been improved even more with the addition of the larger real axle, now 22mm diameter, and a new front brake caliper, both adopted from the 450 RX model. These updates along with new, larger engine main bearings and a new second gear in the transmission on the 250 and 300 models, make for an improved platform overall.
As always, the range is made up of 8 different models, each with its own personality, to cater to the needs of a very diverse spectrum of riders. There's the perfect X-PRO for every rider.  Beta USA suggests riders who would like to discover the different models to reach out to their local Beta dealer to see when they will be holding their Beta “POD” demo day so the different models can be ridden back-to-back.
The 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.

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Features

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.

Coolant Recovery Tank:
200cc Coolant expansion tank prevents overheating by recovering lost coolant into the recovery tank, which will then refill radiators as the engine cools.

Battery
4T models will have a new, lighter, more-performing battery, for safer starts under any usage conditions.

New Frame
Adopted from the RR Race Editions and RX Models, the new frame provides a larger backbone that is stronger with improved control through less flex.

All New ZF SHC Front Fork
Lighter weight, single-sided spring, fully adjustable preload, compression and rebound dampening.
Provide riders with a more planted feel

Front Rescue Strap
Designed to aid when needing to lift the front wheel out a difficult situation

Rear Master Brake Cylinder
Larger volume of fluid over previous models to reduce heat during extreme braking

Lower Seat Height
Three quarters of an inch lower than the 2024 RR models. Newly designed seat shape with softer foam for a more comfortable ride.

Handlebar Mounts
XTrig FlexFix isoelastic bar mounts reduce rider fatigue and vibration. Also allows for flexibility in handlebar adjustment

Specifications

MODEL390 RR X-PRO
ENGINE TYPESingle cylinder, 4 -stroke, liquid cooled, 4-valve (Titanium intake and exhaust), electric start. (back up kick starter as an option)
BORE88mm
STROKE63.4mm
DISPLACEMENT385.6cc
COMPRESSION RATIO12.48:1
VALVE TRAINTitanium Intake & Exhaust
IGNITIONDual-Map Kokusan 200w output On Demand Traction Control
SPARK PLUGNGK LKAR8A-9
LUBRICATIONTwin Oil Pumps w/ Cartridge Filter & Separate Compartments For Engine & Transmission
FUEL SYSTEM42mm Throttle Body w/ Dual Injectors
CLUTCHWet Diaphragm-style
TRANSMISSION6 Speed
FINAL DRIVEO-ring chain
TRACTION CONTROLOn-Demand w/ push of a button
FRAMEMolybdenum steel / Double Cradle w/ quick air filter access
WHEELBASE58.3"
SEAT HEIGHT36.6"
GROUND CLEARANCE12.4"
FOOTREST HEIGHT16"
DRY WEIGHT237 lbs
FUEL TANK CAPACITY2.4 US Gallons
FRONT SUSPENSION48 mm Sachs SHC w/single spring, adjustment for preload, compression and rebound.
REAR SUSPENSIONAluminum Body Sachs shock w/ adjustable rebound and hi/low speed compression
FINAL GEARING13T Front/49T Rear
FRONT WHEEL TRAVEL11.1"
REAR WHEEL TRAVEL11"
FRONT BRAKE260 mm floating rotor
REAR BRAKE240 mm rotor
FRONT/REAR RIM21" (Front) 18" (Rear)
FRONT/REAR TIREMaxxis Enduro
SPECS*Specifications subject to change without notice. Additional information on all models including manuals, accessories and parts books are available online at www.betausa.com under SUPPORT.
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