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Overview:
Beta USA is proud to announce an additional 2025 model to their impressive line-up, the 450 RC. The 2025 450 RC is a model that we have received many emails from customers asking us to build. Based from the success of the 450 RX Motocross model, the 450 RC shares the same proven and durable platform with additional feature added to make the bike a serious off-road race weapon.
The electric start, 5 speed engine provides the power delivery perfect for all-around use, designed for riders who race in the woods on the weekends and hit the moto track during the week, the 450 RC is really a do-all four stroke model. Equipped with an 18" rear wheel, larger fuel tank, handguards, Race model tank panels, formed plastic skid plate, and an o-ring chain to complete the package.
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Features: Chro-Moly single tube frame with aluminum rear subframe, Nissin master cylinders and calipers, high-performance lightweight lithium battery, KYB 48mm closed cartridge front fork with a 50mm KYB rear shock with rising-rate linkage system, electric start, 18" rear wheel, ignition map switch and traction control to adjust engine power and provide less rear wheel slip, easy pull diaphragm clutch allows rider to adjust the lever feel and progression to their preference.
Handlebar Mounts
XTrig FlexFix isoelastic bar mounts reduce rider fatigue and vibration. Also allows for flexibility in handlebar adjustment
Engine Mapping
The mapping has been updated with the latest settings that have been tested by the Beta race team. This along with traction control completes the electronic package of the RC model.
Footpegs
Enhanced grip performance while being less bulky so rider can maintain control at all times
Suspension
Closed cartridge 48mm KYB front fork and the rear shock have been updated with new valving for better overall performance.
Sub-frame & Filter Box
Subframe has been reinforced in key points that stiffen and strengthen it, maintaining lightness and ability to absorb stresses. Access to the filter remains on the left side of the bike and is extremely easy and requires no tools to access
Final Ratio / Rear Axle
Rear sprocket has been replaced with a 51 tooth for a quicker "spin-up" of the power delivery.
The rear axle diameter has been increased to 22mm to reduce flex as well as provide better durability.
| MODEL | 450 RC |
| ENGINE TYPE | Single cylinder, 4 -stroke, liquid cooled, 4-valve with electric start. |
| BORE | 97mm |
| STROKE | 60.8mm |
| DISPLACEMENT | 449.3cc |
| COMPRESSION RATIO | 13.5:1 |
| VALVE TRAIN | Finger followers w/ shim adjustment |
| IGNITION | Dual-Map Kokusan with Traction Control |
| SPARK PLUG | NGK LKAR8A-9 |
| LUBRICATION | Twin Oil Pumps w/Cartridge Filter & Separate Compartments For Engine & Transmission |
| FUEL SYSTEM | 46mm Throttle Body |
| CLUTCH | Hydraulic, adjustable diaphragm multi-plate clutch |
| TRANSMISSION | 5 Speed |
| FINAL DRIVE | DID drive chain |
| FRAME | Molybdenum steel / Double Cradle w/ push button seat and quick air filter access |
| WHEELBASE | 58.4" |
| SEAT HEIGHT | 37.2" |
| GROUND CLEARANCE | 13" |
| FOOTREST HEIGHT | 16.1" |
| DRY WEIGHT | 229 lbs |
| FUEL TANK CAPACITY | 2.4 US Gallons |
| FRONT SUSPENSION | 48 mm KYB AOS closed cartridge fork, adjustable compression & rebound |
| REAR SUSPENSION | KYB 50mm body with adjustable rebound and high/low speed on compression adjustment |
| FRONT WHEEL TRAVEL | 12" |
| REAR WHEEL TRAVEL | 11.8" |
| FRONT BRAKE | 260 mm floating rotor |
| REAR BRAKE | 240 mm rotor |
| FRONT/REAR RIM | 21" (Front) 18" (Rear) |
| FRONT/REAR TIRE | Maxxis |
| SPECS | *Specifications subject to change without notice |
