Beta 390 RS 4-Stroke
| Brand | Beta | |
| Model | Beta 390 RS 4-Stroke | |
| Type of Vehicle | Super Motards | |
| Class | Class 2A | |
| Engine Capacity | 386cc | |
| Engine | Single Cylinder, 4-stroke, Liquid-cooled, DOHC, Fuel Injected | |
| Bore and Stroke | 88 mm x 63.4 mm | |
| Compression Ratio | 12.48:1 | |
| Max Power | ~38–40 hp | |
| Max Torque | - | |
| Fuel System | Electronic Fuel Injection | |
| Transmission | 6 Gears; Wet Multi-disc | |
| Frame Type | Chromium-molybdenum steel with double cradle | |
| Front Tyre | 110/80 – 19 | |
| Rear Tyre | 140/80 – 18 | |
| Overall Length | ~2170 mm | |
| Overall Width | ~830 mm | |
| Overall Height | ~1270 mm | |
| Wheelbase | 1480 mm | |
| Seat Height | ~930 mm | |
| Dry Weight | ~110–113 kg | |
| Fuel Capacity | 9.5 litres | |
| Max Speed | ~145–155 km/h |
The Beta 390 RS is a premium, street-legal dual-sport motorcycle designed by the Italian manufacturer Beta for riders who prioritize handling and "rideability" over raw aggression. It is powered by a 385.6cc liquid-cooled, fuel-injected engine that offers a smoother, more linear power delivery than the 350, making it exceptionally easy to manage in technical terrain. The 2026 model features a new double-cradle chromoly frame for enhanced stability, high-quality Sachs ZF suspension, and the Trail Tech Voyager GPS as standard equipment. While it shares the same dry weight of 237 pounds with its 350 sibling, the 390 is distinguished by its longer stroke and lower compression ratio, resulting in a more tractor-like torque that helps the bike find traction where higher-revving engines might struggle. The name difference reflects this specialized displacement; while the 350 uses a shorter stroke for a snappy, race-oriented feel, the 390's additional 36cc provides a calmer, more planted character that Beta calls their "ideal mix" for versatile trail and street use.
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