Beta RR 390 EFI User Manual (English)

Questions and Answers:

M
Misty SimmonsAug 4, 2025
Why is my Beta RR 390 EFI engine overheating?
- G
  Gregory WallsAug 4, 2025
  If your Beta Motorcycle engine overheats, it might be due to several reasons: * The radiator grill could be blocked, in which case you should remove and clean it. * The radiator (air side) might be blocked, so cleaning the radiator is recommended. * There might be insufficient airflow; check if the cooling fan is working correctly. * A partly clogged silencer can also cause overheating; in this case, contact authorised BETAMOTOR customer service.
C
candice42Aug 8, 2025
What to do if Beta Motorcycle engine rotates, but does not start?
- T
  tstevensAug 8, 2025
  If your Beta Motorcycle engine rotates but doesn't start, consider these possibilities: * The fuel quick release fittings might be incorrectly inserted; ensure they are properly inserted. * A dirty spark plug can prevent starting; clean or replace the spark plug. * The spark gap might be wrongly adjusted; restore the spark gap. * A faulty ignition/injection system could also be the cause; contact authorised BETAMOTOR customer service.
A
Angela DawsonAug 12, 2025
What to do if the Beta Motorcycle engine starts but the light comes on “FI”?
- M
  Mikayla PierceAug 12, 2025
  If your Beta Motorcycle engine starts but the “FI” light comes on, this indicates a problem with the injection system. Contact authorised BETAMOTOR customer service for assistance.
K
Kimberly WalterAug 17, 2025
Why does my Beta Motorcycle motor stop or splutter?
- J
  Jennifer CooleyAug 17, 2025
  If your Beta Motorcycle motor stops or splutters, it is likely due to a lack of fuel. Refuel your motorcycle.
A
Amanda HowardAug 21, 2025
Why is the front braking poor on my Beta RR 390 EFI Motorcycle?
- J
  Jill EllisAug 21, 2025
  If you are experiencing poor front braking on your Beta Motorcycle, it could be due to worn brake pads or air/humidity in the hydraulic circuit. Contact authorised BETAMOTOR customer service for assistance.
S
sarahtorresAug 26, 2025
Why is the rear braking poor on my Beta RR 390 EFI?
- D
  Danielle WrightAug 26, 2025
  If you are experiencing poor rear braking on your Beta Motorcycle, it could be due to worn brake pads or air/humidity in the hydraulic circuit. Contact authorised BETAMOTOR customer service for assistance.
D
Danielle KelleyAug 30, 2025
Why does the electric starter on my Beta RR 390 EFI not turn?
- N
  Nichole SchmidtAug 30, 2025
  If the electric starter on your Beta Motorcycle does not turn, it could be due to: * A decompressor failure, in which case you should contact authorised BETAMOTOR customer service. * A flat battery; check the battery. * A blown fuse; replace it. * A defective relay or starter motor; in these cases, contact authorised BETAMOTOR customer service.

Beta RR 390 EFI Specifications

General

Displacement	386 cc
Fuel System	Electronic Fuel Injection (EFI)
Transmission	6-speed
Seat Height	940 mm
Bore x Stroke	88 mm x 63.4 mm
Compression Ratio	12.5:1
Starting System	Electric starter
Lubrication	Wet sump
Final Drive	Chain
Dry Weight	112 kg
Cooling System	Liquid-cooled
Front Tire	90/90-21
Rear Tire	140/80-18
Ground Clearance	320 mm
Engine Type	Single cylinder, 4-stroke
Ignition	Digital CDI
Front Suspension	Upside-down fork, 48 mm
Rear Suspension	Monoshock
Front Brake	Single disc
Rear Brake	Single disc
Clutch	Wet multi-disc