390 RS 4-Stroke - 2026 Specifications and Reviews

Name: 2026 390 RS 4-Stroke
Brand: Beta

The 2026 Beta 390 RS is a lightweight, versatile single-cylinder 4-stroke designed for trail riders and enduro enthusiasts seeking easy handling and reliable performance. Its 386cc liquid-cooled engine delivers accessible power while the adjustable KYB suspension and semi-double cradle frame excel in technical terrain and varied riding conditions.

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2026

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Engine and Transmission Specifications
Final Drive	Chain
Clutch	Wet multi-disc hydraulic w/ dual springs
Lubrication System	Twin oil pumps w/ cartridge oil filter
Ignition	GET
Compression Ratio	12.5:1
Capacity	386 cc
Engine Type	Single cylinder, 4-stroke, 4-valve, DOHC, EFI, liquid cooled
Physical measures and capacities
Wheelbase	58.3 in
Seat Height	37.4 in
Ground Clearance	12.6 in
390 RS 4-Stroke dimensions and frame
Rear Suspension	Fully adjustable KYB
Frame	Red steel semi-double cradle