390 RS 4-Stroke
The Beta 390 RS 4-Stroke is built for riders who want one bike that can confidently handle both pavement and serious off-road terrain. Its 385.6cc liquid-cooled four-stroke engine delivers a strong balance of responsive power and usable torque, giving the 390 a nimble feel while offering more low-to-midrange pull than the 350. With electronic fuel injection, dual injectors, electric start, a six-speed transmission, and selectable engine mapping with on-demand traction control, the 390 RS is ready for everything from technical trails to longer dual-sport adventures.
The RS platform brings genuine enduro performance to a 50-state street-legal package, allowing you to ride directly from the pavement onto the trail without compromising its off-road capability. The 390 features a new main frame designed for improved stability, Xtrig FlexFix handlebar mounts to reduce vibration, Sachs ZF suspension with tool-less adjustability, and 21"/18" wheels built for serious dirt riding. Add full street equipment, a spark arrestor, Voyager GPS navigation, a 200W high-output stator, and an easy-access air filter, and the 390 RS becomes a versatile go-anywhere dual-sport for riders who want the freedom to explore without being limited to one type of terrain.
Engine: Single-cylinder, 4-stroke, 4-valve, liquid-cooled
Displacement: 385.6cc
Bore x Stroke: 88mm x 63.4mm
Compression Ratio: 12.48:1
Fuel System: 42mm electronic fuel injection with dual injectors
Valve Train: Titanium intake and exhaust valves
Cooling: Liquid-cooled with cooling fan
Ignition: Kokusan dual-map, 200W output
Clutch: Wet diaphragm-style
Transmission: 6-speed
Final Drive: O-ring chain
Starting: Electric start
Dry Weight: Approx. 237 lbs
Seat Height: Approx. 36.8"
Ground Clearance: Approx. 12.2"
Wheelbase: Approx. 58.7"
Fuel Capacity: 2.4 gallons
Front Suspension: 48mm Sachs ZF fork with tool-less adjustability
Rear Suspension: Sachs ZF shock with adjustable damping
Front Brake: 260mm floating disc
Rear Brake: 240mm disc
Wheels: 21" front / 18" rear
Tires: DOT Maxxis Enduro
Electronics: On-demand traction control, dual engine maps, 200W high-output stator
Navigation: Trail Tech Voyager GPS
Street Equipment: Headlight, taillight, turn signals, mirrors, horn, license-plate equipment
Key Features: 50-state street legal, EFI, dual injectors, electric start, traction control, selectable maps, Sachs suspension, Xtrig FlexFix mounts, spark arrestor, quick-access air filter, Voyager GPS navigation
The Beta 390 RS 4-Stroke is built for riders who want one bike that can confidently handle both pavement and serious off-road terrain. Its 385.6cc liquid-cooled four-stroke engine delivers a strong balance of responsive power and usable torque, giving the 390 a nimble feel while offering more low-to-midrange pull than the 350. With electronic fuel injection, dual injectors, electric start, a six-speed transmission, and selectable engine mapping with on-demand traction control, the 390 RS is ready for everything from technical trails to longer dual-sport adventures.
The RS platform brings genuine enduro performance to a 50-state street-legal package, allowing you to ride directly from the pavement onto the trail without compromising its off-road capability. The 390 features a new main frame designed for improved stability, Xtrig FlexFix handlebar mounts to reduce vibration, Sachs ZF suspension with tool-less adjustability, and 21"/18" wheels built for serious dirt riding. Add full street equipment, a spark arrestor, Voyager GPS navigation, a 200W high-output stator, and an easy-access air filter, and the 390 RS becomes a versatile go-anywhere dual-sport for riders who want the freedom to explore without being limited to one type of terrain.
Engine: Single-cylinder, 4-stroke, 4-valve, liquid-cooled
Displacement: 385.6cc
Bore x Stroke: 88mm x 63.4mm
Compression Ratio: 12.48:1
Fuel System: 42mm electronic fuel injection with dual injectors
Valve Train: Titanium intake and exhaust valves
Cooling: Liquid-cooled with cooling fan
Ignition: Kokusan dual-map, 200W output
Clutch: Wet diaphragm-style
Transmission: 6-speed
Final Drive: O-ring chain
Starting: Electric start
Dry Weight: Approx. 237 lbs
Seat Height: Approx. 36.8"
Ground Clearance: Approx. 12.2"
Wheelbase: Approx. 58.7"
Fuel Capacity: 2.4 gallons
Front Suspension: 48mm Sachs ZF fork with tool-less adjustability
Rear Suspension: Sachs ZF shock with adjustable damping
Front Brake: 260mm floating disc
Rear Brake: 240mm disc
Wheels: 21" front / 18" rear
Tires: DOT Maxxis Enduro
Electronics: On-demand traction control, dual engine maps, 200W high-output stator
Navigation: Trail Tech Voyager GPS
Street Equipment: Headlight, taillight, turn signals, mirrors, horn, license-plate equipment
Key Features: 50-state street legal, EFI, dual injectors, electric start, traction control, selectable maps, Sachs suspension, Xtrig FlexFix mounts, spark arrestor, quick-access air filter, Voyager GPS navigation