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Overview:
Quick, precise, and lean best describe Beta's new RR Race models for the 2025 season. With a new, shortened name to simply “RR Race” to get straight to the point. The 2025 RR Race lineup provides riders with a model whose performance is second to none.
The 2025 RR Race bikes represent the race-ready versions of Beta's newly-introduced X-Pro models, with a series of modifications to the engine, suspension, and frame, making them ideal for providing their best on the track. Designed for both low and high-speed courses, the Race models will provide riders with the confidence and Rideability that only Beta can deliver.
All four-stroke Race models receive new crankcases, derived from the engine used on the RX 450. The main benefit deriving from the use of this new component lies in the smaller size and lighter weight compared to the previous model.
Aesthetically sleeker, the new four-stroke Race MY 2025 engine now leaves more space for the exhaust passage as well, facilitating installation, removal or replacement operations.
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Features: New billet aluminum footpegs, six speed transmission, adjustable KYB AOS closed cartridge front forks, KYB rear shock with adjustable rebound and high/low on compression adjustment, easy access air filter box, electric start (kickstarter sold as an accessory), off-road light & meter package, smooth 4-stroke power delivery, front axle pull, dual material rear sprocket, quick release seat removal, MAP switch on handlebars for better access, reinforced handguards, on-demand traction control, new higher performing front brake caliper, softer nonslip race seat, anodized black shift lever and rear brake pedal, anodized red aluminum fluid caps, larger rear axle, the lightest feeling 4-stroke range ever produced, and racing graphics & seat cover.
Front brake calliper:
A lighter and higher-performance Nissin calliper that provides an improved front brake feel. This new design provides a factory-like front brake system.
New machined alloy footpegs:
Redesigned for 2025 with a new shape that provides better boot traction in muddy and unstable conditions.
Larger rear wheel axle:
This new axle offers greater stiffness providing the rider with better feedback while improving turning. The rear swingarm has also been updated to accommodate the new axle.
Improved engine power:
All four-stroke Race models receive new crankcases, derived from the engine used on the 450 RX. The main benefit of this new component lies in the smaller size and lighter weight compared to the previous model.
Map switch on the handlebars:
The map switch button has been moved up to the handlebar pad for quicker access. On the four-stroke models, both the map switch and the traction control button are also mounted in the top handlebar pad.
MODEL | 390 RR Race |
ENGINE TYPE | Single cylinder, 4 -stroke, liquid cooled, 4-valve (Titanium intake and exhaust), electric start |
BORE | 88mm |
STROKE | 63.4mm |
DISPLACEMENT | 385.6cc |
COMPRESSION RATIO | 12.48:1 |
VALVE TRAIN | Titanium Intake & Exhaust |
IGNITION | Dual-Map Kokusan 200w output |
SPARK PLUG | NGK LKAR8A-9 |
LUBRICATION | Twin Oil Pumps w/ Cartridge Filter & Separate Compartments For Engine & Transmission |
FUEL SYSTEM | 42mm Throttle Body w/ Dual Injectors |
CLUTCH | Wet Diaphragm-style |
TRANSMISSION | 6 Speed |
FINAL DRIVE | O-ring chain |
TRACTION CONTROL | On-Demand w/ push of a button |
FRAME | Molybdenum steel / Double Cradle w/ quick air filter access |
WHEELBASE | 58.1" |
SEAT HEIGHT | 37.4" |
GROUND CLEARANCE | 13.2" |
FOOTREST HEIGHT | 16.8" |
DRY WEIGHT | 237 lbs |
FUEL TANK CAPACITY | 2.4 US Gallons |
FRONT SUSPENSION | 48 mm KYB AOS closed cartridge fork, adjustable compression & rebound |
REAR SUSPENSION | KYB 46mm body with adjustable rebound and high/low speed on compression adjustment |
FINAL GEARING | 13T Front/49T Rear |
FRONT WHEEL TRAVEL | 11.8" |
REAR WHEEL TRAVEL | 11.3" |
FRONT BRAKE | 260 mm floating rotor |
REAR BRAKE | 240 mm rotor |
FRONT/REAR RIM | 21" (Front) 18" (Rear) |
FRONT/REAR TIRE | Maxxis Maxx Enduro |
SPECS | *Specifications subject to change without notice. |