Agile handling. Strong four-stroke power. Built for whatever the trail throws at you.
The 2027 Beta RR 390 X-Pro 4T brings together the lightweight feel of a smaller-displacement enduro bike with the torque and power of a larger four-stroke. Its 385.6cc single-cylinder engine is designed to deliver strong, usable power while keeping the bike responsive and manageable on technical terrain. Beta positions the 390 X-Pro as a balance between agility and four-stroke performance.
For 2027, the RR 390 X-Pro receives a number of chassis and electronics updates designed to make it even more versatile. Riders get 5-level Launch Control, Quick Shift, 2-level Traction Control and dual engine maps, giving you more ways to tailor the bike to the terrain and riding conditions.
The X-Pro chassis uses a 48mm Sachs SHC front fork with adjustable preload, compression and rebound, paired with an aluminum-body Sachs rear shock with high/low-speed compression and rebound adjustment. The lower 36.6-inch seat height also makes the 390 easier to manage when riding technical trails or tackling difficult sections.
Engine: 385.6cc liquid-cooled 4-stroke single-cylinder
Bore x Stroke: 88mm x 63.4mm
Compression Ratio: 13.19:1
Valve Train: Titanium intake & exhaust valves
Fuel System: 42mm throttle body with dual injectors
Ignition: Dual-map Kokusan
Starting: Electric start
Transmission: 6-speed
Clutch: Wet multi-disc
Final Drive: O-ring chain
Front Suspension: 48mm Sachs SHC
Rear Suspension: Aluminum-body Sachs shock
Front Travel: 11.1"
Rear Travel: 11.0"
Front Brake: 260mm floating rotor
Rear Brake: 240mm rotor
Wheels: 21" front / 18" rear
Tires: Maxxis Enduro
Seat Height: 36.6"
Ground Clearance: 12.4"
Fuel Capacity: 2.4 gallons
Dry Weight: 237 lbs
Agile handling. Strong four-stroke power. Built for whatever the trail throws at you.
The 2027 Beta RR 390 X-Pro 4T brings together the lightweight feel of a smaller-displacement enduro bike with the torque and power of a larger four-stroke. Its 385.6cc single-cylinder engine is designed to deliver strong, usable power while keeping the bike responsive and manageable on technical terrain. Beta positions the 390 X-Pro as a balance between agility and four-stroke performance.
For 2027, the RR 390 X-Pro receives a number of chassis and electronics updates designed to make it even more versatile. Riders get 5-level Launch Control, Quick Shift, 2-level Traction Control and dual engine maps, giving you more ways to tailor the bike to the terrain and riding conditions.
The X-Pro chassis uses a 48mm Sachs SHC front fork with adjustable preload, compression and rebound, paired with an aluminum-body Sachs rear shock with high/low-speed compression and rebound adjustment. The lower 36.6-inch seat height also makes the 390 easier to manage when riding technical trails or tackling difficult sections.
Engine: 385.6cc liquid-cooled 4-stroke single-cylinder
Bore x Stroke: 88mm x 63.4mm
Compression Ratio: 13.19:1
Valve Train: Titanium intake & exhaust valves
Fuel System: 42mm throttle body with dual injectors
Ignition: Dual-map Kokusan
Starting: Electric start
Transmission: 6-speed
Clutch: Wet multi-disc
Final Drive: O-ring chain
Front Suspension: 48mm Sachs SHC
Rear Suspension: Aluminum-body Sachs shock
Front Travel: 11.1"
Rear Travel: 11.0"
Front Brake: 260mm floating rotor
Rear Brake: 240mm rotor
Wheels: 21" front / 18" rear
Tires: Maxxis Enduro
Seat Height: 36.6"
Ground Clearance: 12.4"
Fuel Capacity: 2.4 gallons
Dry Weight: 237 lbs