{"product_id":"2026-beta-350-rx-kingpin","title":"2026 Beta 350 RX Kingpin","description":"\u003ch2\u003e2026 Beta 350 RX Kingpin\u003c\/h2\u003e\n\u003cp\u003eThe Kingpin has arrived. For 2026 Beta went big, adding an all-new 350cc two-stroke to the RX motocross line — a purpose-built big-bore that replaces the 300 RX and lines up alongside the new 250 RX and the MXGP-proven 450 RX. Beta's engineers spent a couple of years getting the power character just right, with one goal: open-class two-stroke muscle delivered with Beta's trademark RideAbility — a bike that's easier to ride fast, not just faster.\u003c\/p\u003e\n\u003ch4\u003eMore...\u003c\/h4\u003e\n\u003ch3\u003eAll-New 350 Engine\u003c\/h3\u003e\n\u003cp\u003eThis isn't a bored-out 300 — it's a completely new, purpose-built engine designed around linear, usable big-bore power. The highlights:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e351.7cc big-bore two-stroke\u003c\/strong\u003e — new engine cases with a 78 x 73.6mm bore and stroke and a longer crankshaft, built to deliver the torque and horsepower only a big-bore 2-stroke can provide.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwin-plug cylinder head\u003c\/strong\u003e — dual spark plugs for cleaner, more complete combustion. The result is a wider, more linear powerband with big torque down low and the over-rev to keep pulling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounter balancer\u003c\/strong\u003e — smooths out vibration so the big single stays comfortable through long motos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-speed gearbox with 14\/47 final gearing\u003c\/strong\u003e — ratios and final drive tuned to put the torque to the ground on a wide range of track conditions.\u003c\/li\u003e\n\u003cli\u003eKeihin PWK 38mm carburetor with pre-mix lubrication and Beta's BPV (Beta Progressive Valve) exhaust valve system.\u003c\/li\u003e\n\u003cli\u003eElectric start is standard, with a backup kick starter available as an option.\u003c\/li\u003e\n\u003cli\u003eWet diaphragm-style clutch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMX Chassis \u0026amp; Components\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKYB AOS 48mm closed-cartridge fork\u003c\/strong\u003e — adjustable compression and rebound damping, 12.0 in. of travel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKYB 50mm rear shock\u003c\/strong\u003e — adjustable rebound plus high- and low-speed compression damping, 11.8 in. of travel.\u003c\/li\u003e\n\u003cli\u003eMolybdenum steel double-cradle frame with quick air-filter access.\u003c\/li\u003e\n\u003cli\u003eNissin brakes — 260mm floating front rotor with dual-piston caliper, 240mm rear rotor.\u003c\/li\u003e\n\u003cli\u003e21\" front \/ 19\" rear wheels with Dunlop Geomax MX34 tires (80\/100-21 front, 120\/80-19 rear).\u003c\/li\u003e\n\u003cli\u003eO-ring chain final drive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 16px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold; width: 40%;\"\u003eMSRP\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e$10,290\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eEngine\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e351.7cc single-cylinder 2-stroke, liquid-cooled, counter balancer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eBore x Stroke\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e78 x 73.6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eCompression Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e12.45:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eFuel System\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eKeihin PWK 38mm carburetor, pre-mix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eExhaust Valve\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eBPV (Beta Progressive Valve) system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eIgnition\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eTwin-plug head, AC Kokusan CDI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eClutch\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eWet diaphragm-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eTransmission\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e5-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eFinal Drive\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eO-ring chain, 14\/47 gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eStarter\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eElectric (backup kick starter optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eFrame\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eMolybdenum steel, double cradle, quick air-filter access\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eFront Suspension\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e48mm KYB AOS closed-cartridge USD fork, 12.0 in. travel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eRear Suspension\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eKYB 50mm shock, 11.8 in. travel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eFront Brake\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e260mm floating rotor, Nissin dual-piston caliper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eRear Brake\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e240mm rotor, Nissin single-piston caliper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eTires\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003eFront 80\/100-21, Rear 120\/80-19 (Dunlop Geomax MX34)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eWheelbase\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e58.7 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eSeat Height\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e37.2 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eGround Clearance\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e13.4 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eFootrest Height\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e16.6 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eFuel Capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e1.5 gal.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd; font-weight: bold;\"\u003eWeight (claimed)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #ddd;\"\u003e220.5 lbs (wet, no fuel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eQuestions about this bike? Call Vamoose Gear Powersports at (970) 765-8950 or stop by 1912 S Townsend Ave in Montrose, CO.\u003c\/em\u003e\u003c\/p\u003e","brand":"Beta","offers":[{"title":"Default Title","offer_id":50470646481152,"sku":"300359","price":10290.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0050\/9912\/6847\/files\/IMG_0044.jpg?v=1776800494","url":"https:\/\/vamoosegear.com\/products\/2026-beta-350-rx-kingpin","provider":"Vamoose Gear Powersports","version":"1.0","type":"link"}