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Built for Any Moto, Ready for Every Gate. 350 RX: 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 350 motocrosser will thrive in many different track conditions. Clearly in a class of its own! The 2-stroke range of motocross models also have been refined with updates to the following: -A new piston for the 350 that saves weight as well as reduces friction, resulting in a 1.5 hp gain. -Updated final gearing for the 250 to improve starts. -New muffler that is stronger than the prior model -Dunlop MX 34 tires With more torque, increased horsepower, and a refined chassis setup, the 350 RX doesn't just compete—it defines a new standard for what a big-bore two-stroke is capable of achieving. ENGINE SPECIFICATION ENGINE TYPE Beta Built single cylinder, 2-stroke, liquid cooled, with BPV power valve system and counter balancer, electric start. 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 NGK MR7CI8 LUBRICATION Pre-Mix CARBURETOR Keihin PWK 38mm CLUTCH Wet diaphram style TRANSMISSION 5 Speed FINAL DRIVE Non-O-ring chain CHASSIS SPECIFICATION FRAME Molybdenum steel / Double Cradle w/ quick air filter access WHEELBASE 58.2" SEAT HEIGHT 37.2" GROUND CLEARANCE 13.4" FOOTREST HEIGHT 16.6" DRY WEIGHT 220.5 lbs FUEL TANK CAPACITY 1.85 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" 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 Dunlop Geomax MX 34 DOWNLOADS TECH 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. $10,290.00 MSRP + Tax Destination Fee $589.00 Build & Prep Fee $147.00 Documentation Fee $89.00
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🇺🇸 Ship from USA · On Agora since 2026
$10,290.00