2026 Beta 350 RX KINGPIN
Beta has added two new motocross models to join the big brother 450 in the RX range. All-new 250 and 350 RX 2 strokes are the new bosses in town! Beta’s 450 RX has been racing on the world MXGP tour for four years and the AMA USA Supercross series for two and has proven to be a serious contender. The Italian Beta engineers decided to “Go Big” for 2026 and add not only a 250 cc bike to race in the proper classes but also added a 350 RX model as well for everyone else! All Beta MX models are designed with the trademark RideAbility in mind. A motorcycle that is overall easier to ride.
350 RX: All new for 2026, this new model replaces the 300 version for the 2026 season. New engine cases, bore and stroke, as well as a twin-plug head to ignite the special power only a big-bore 2-stroke can provide. The longer crankshaft, combined with the final gearing ratio of 14/47, provides a large amount of torque and overall horsepower that will turn some heads. This new 350 motocrosser will thrive in many different track conditions. Clearly in a class of its own!
$11,068 OUT THE DOOR! (plus applicable taxes)
| ENGINE TYPE | Beta Built single cylinder, 2-stroke, liquid cooled, with BPV power valve system and counter balancer, electric start with back-up kick starter sold as an option |
| BORE | 78mm |
| STROKE | 73.6mm |
| DISPLACEMENT | 351.7cc |
| COMPRESSION RATIO | 12:45:1 |
| EXHAUST VALVE | Beta Progressive Valve (BPV) |
| IGNITION | AC-CDI Kokusan |
| SPARK PLUG | Dual MR7VBI-8 |
| LUBRICATION | Pre-Mix |
| FUEL SYSTEM | Keihin PWK 38mm |
| CLUTCH | Wet Diaphragm-style |
| TRANSMISSION | 5 Speed |
| FINAL DRIVE | O-ring chain |
| FRAME |
Molybdenum steel / Double
Cradle w/ quick air filter
access
|
| WHEELBASE | 58.7" |
| SEAT HEIGHT | 37.2" |
| GROUND CLEARANCE | 13.4" |
| FOOTREST HEIGHT | 16.6" |
| DRY WEIGHT |
220.5 lbs (wet weight, no fuel)
|
| FUEL TANK CAPACITY | 1.5 US Gallons |
| FRONT SUSPENSION | 48 mm KYB AOS Closed Cartridge with adjustable compression & rebound |
| REAR SUSPENSION | KYB 50 mm body with adjustable rebound and high/low speed on compression adjustment |
| FRONT WHEEL TRAVEL | 12.0" |
| REAR WHEEL TRAVEL | 11.8" |
| FRONT BRAKE | 260 mm floating rotor |
| REAR BRAKE | 240 mm rotor |
| FRONT/REAR RIM | 21" (Front) 19" (Rear) |
| FRONT/REAR TIRE | 80/100 | 120/80 |
| 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. |
| MSRP | $10,290 |
| FREIGHT | $529 |
| SETUP | $249 |
| OUT THE DOOR PRICING | $11,068 + TAX |
