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2023 Beta 390 RR 4-Stroke
2023 Beta 390 RR 4-Stroke

Specs

General Information

Manufacturer
Beta
Beta
Model Year
2023
2023
Model
390 RR 4-Stroke
390 RR 4-Stroke
Model Code
390RR4STROKE
390RR4STROKE
Color
Red
Red

Brakes/Wheels/Tires

Brakes

Front - 260 mm rotor

Rear - 240 mm rotor

Front - 260 mm rotor

Rear - 240 mm rotor

Rims

Front - 21 in.

Rear - 18 in.

Front - 21 in.

Rear - 18 in.

Tires
Front / Rear - Maxxis Enduro
Front / Rear - Maxxis Enduro

Dimensions

Height
Footrest - 16.3 in.
Footrest - 16.3 in.
Weight
237 lb. (wet weight, no fuel)
237 lb. (wet weight, no fuel)
Ground Clearance
12.6 in.
12.6 in.
Wheelbase
58.7 in.
58.7 in.
Seat Height
37 in.
37 in.

Drivetrain

Transmission
6 Speed
6 Speed
Final Drive

O-ring chain

Final gearing front - 13T

Final gearing rear - 48T

O-ring chain

Final gearing front - 13T

Final gearing rear - 48T

Electrical

Instrumentation
Trail Tech Voyager GPS unit
Trail Tech Voyager GPS unit

Engine

Engine
4-stroke, 4-valve (Titanium valves)
4-stroke, 4-valve (Titanium valves)
Cooling
Liquid cooled, fan
Liquid cooled, fan
Cylinders
Single
Single
Displacement
385.6 cc
385.6 cc
Bore x Stroke
88 x 63.4 mm
88 x 63.4 mm
Compression Ratio
12.48:1
12.48:1
Clutch
Wet Diaphragm-style
Wet Diaphragm-style
Fuel System
42 mm Throttle Body with Dual Injectors
42 mm Throttle Body with Dual Injectors
Exhaust
Valve - Titanium Intake
Valve - Titanium Intake
Ignition

Dual-Map Kokusan 200 W output

Spark Plug - NGK LKAR8A-9

Dual-Map Kokusan 200 W output

Spark Plug - NGK LKAR8A-9

Starting
Electric (back-up kick start available as an option)
Electric (back-up kick start available as an option)
Lubrication
Twin oil pumps with cartridge filter & separate compartments for engine & transmission
Twin oil pumps with cartridge filter & separate compartments for engine & transmission
Fuel Capacity
2.4 US gal.
2.4 US gal.

Operational

Frame
Molybdenum steel, double cradle with quick air filter access
Molybdenum steel, double cradle with quick air filter access
Front Suspension

48 mm Sachs Open Cartridge with compression, rebound & spring preload adjustment

Wheel Travel - 11.6 in.

48 mm Sachs Open Cartridge with compression, rebound & spring preload adjustment

Wheel Travel - 11.6 in.

Rear Suspension

Aluminum Body Sachs shock with adjustable rebound and hi / low speed compression

Wheel travel - 11.4 in.

Aluminum Body Sachs shock with adjustable rebound and hi / low speed compression

Wheel travel - 11.4 in.

Other

Warranty
6 month Limited
6 month Limited

Features

Features

  • RADIATOR SHROUDS: The new shrouds are narrower than before to give the rider more freedom of movement, especially when cornering. Designed to be sleek and also contribute to the revised, simple, and essential new look of the bike.
  • FRONT FORKS: The geometry of the oil passages around the fork piston has been modified to eliminate any air in the system to ensure impeccably smooth fork action throughout the entire travel. Resulting in improved rider comfort with more composed and controlled response even in rough terrain conditions.
  • REAR LINKAGE: Unlike others in the category, Beta RR models have a linkage system in the rear suspension for a more plush trail ride feel with the ability to react to sharp square-edged hits as well.
  • ELECTRIC START: An electric start for perfect start-up convenience whatever the situation (back-up kickstarter option available as an accessory)
  • EXHAUST: All four stroke models feature an exhaust header with a long head pipe that improves engine response at low engine speeds and increases torque at mid-range engine speeds for a more tractable power delivery across the entire rev range, letting the rider get themselves out of trouble more easily or choose to use a higher gear than they normally would, for a more relaxed riding experience.
  • TRACTION CONTROL: All 4 stroke Beta Enduro models now boast traction control. Riders can disengage traction control at any time and in either of the engine maps available. Traction control is calibrated differently for each of the two map options, offering the rider a choice of 4 different electronic control configurations.
  • ENGINE MAPS: Advanced electronics take full advantage of the increased torque at low to medium engine speeds made available by the new exhaust header. Four stroke models now feature dedicated new engine management maps that spread the power curve out more uniformly across the entire usable range of the engine.

Features

  • RADIATOR SHROUDS: The new shrouds are narrower than before to give the rider more freedom of movement, especially when cornering. Designed to be sleek and also contribute to the revised, simple, and essential new look of the bike.
  • FRONT FORKS: The geometry of the oil passages around the fork piston has been modified to eliminate any air in the system to ensure impeccably smooth fork action throughout the entire travel. Resulting in improved rider comfort with more composed and controlled response even in rough terrain conditions.
  • REAR LINKAGE: Unlike others in the category, Beta RR models have a linkage system in the rear suspension for a more plush trail ride feel with the ability to react to sharp square-edged hits as well.
  • ELECTRIC START: An electric start for perfect start-up convenience whatever the situation (back-up kickstarter option available as an accessory)
  • EXHAUST: All four stroke models feature an exhaust header with a long head pipe that improves engine response at low engine speeds and increases torque at mid-range engine speeds for a more tractable power delivery across the entire rev range, letting the rider get themselves out of trouble more easily or choose to use a higher gear than they normally would, for a more relaxed riding experience.
  • TRACTION CONTROL: All 4 stroke Beta Enduro models now boast traction control. Riders can disengage traction control at any time and in either of the engine maps available. Traction control is calibrated differently for each of the two map options, offering the rider a choice of 4 different electronic control configurations.
  • ENGINE MAPS: Advanced electronics take full advantage of the increased torque at low to medium engine speeds made available by the new exhaust header. Four stroke models now feature dedicated new engine management maps that spread the power curve out more uniformly across the entire usable range of the engine.