Beta RR 390 EFI - User Manual

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.

Summary

CHAPTER 1 GENERAL INFORMATION

Vehicle identification data

Official numbers stamped on frame and engine for identification.

Specifications

Key technical data including weight, dimensions, and capacities.

Engine

Detailed specifications of the engine type, bore, stroke, and transmission.

Oil Recommendations

Recommended types and grades of oil for various motorcycle systems.

CHAPTER 2 OPERATION

Fuelling

Procedure for safely refueling the motorcycle with unleaded petrol.

Starting the engine

Step-by-step guide for starting the engine using electric or kick starter.

CHAPTER 3 ADJUSTMENTS

CHAPTER 4 CHECKS AND MAINTENANCE

Engine oil

How to check and replace engine oil.

Liquid coolant

Procedure for checking and topping up the cooling system.

Front brake

Rear brake

Tightening torque overview

CHAPTER 6 TROUBLESHOOTING

Troubleshooting

Common problems, their causes, and recommended solutions.

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