Beta 390 RS 4-Stroke - 2026 Specifications and Reviews

Name: 2026 Beta 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

Beta 390 RS 4-Stroke dimensions and frame
Rear Suspension	Fully adjustable KYB
Frame	Red steel semi-double cradle

Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track70%

City25%

Cornering80%

Daily Riding20%

Touring25%

Passenger5%

Rider Profile

Best For	This is a serious enduro machine best suited to intermediate through expert off-road riders comfortable with a tall, aggressive competition-focused motorcycle.
Purpose	Built for enduro racing and technical trail riding, with a high-compression liquid-cooled four-stroke engine and fully adjustable KYB suspension tuned for demanding off-road terrain.
Rider Fit	The 37.4 inch seat height and lightweight enduro-focused chassis demand good rider fitness, leg length, and confidence standing on the pegs over rough ground.
Character	Sharp, responsive, and purpose-built, this bike rewards an aggressive, active riding style rather than relaxed cruising.
Not Ideal For	This is not the right choice for riders wanting a comfortable daily commuter, a passenger-friendly bike, or a long-distance road touring machine.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.