Beta EVO 4T - User Manual

Questions and Answers

A
aharrisAug 16, 2025
What to do if my Beta Motorcycle engine overheats?
- J
  James HarrisAug 16, 2025
  If your Beta Motorcycle engine overheats, with liquid or vapor coming from the radiator vent, several factors could be responsible. The radiator grill or the radiator itself (air side) might be blocked, so clean them. Ensure the cooling fan is working correctly, as the forced ventilation may be absent. Contact authorised BETAMOTOR customer service if the silencer is partly clogged or the carburation is too lean.
I
Isabel FigueroaAug 18, 2025
What to do if my Beta Motorcycle motor stops or sputters?
- A
  Anthony RodriguezAug 19, 2025
  If your Beta Motorcycle motor stops or sputters, it might be due to a lack of fuel. In this case, move the fuel cock to 'A' or refuel. Also, check that the sleeve between the carburetor and engine is intact, because a poor carburettor seal can cause the problem. Inspect the connector or ignition coil for looseness or oxidation; clean and treat with a specific spray if needed.
B
bwilliamsAug 22, 2025
How to fix a Beta EVO 4T engine that turns over but won't start?
- C
  Calvin HayesAug 22, 2025
  If your Beta Motorcycle's engine turns over but doesn't start, it could be due to several reasons. First, check if the fuel cock is in the 'C' position and turn it to the 'A' position. Another possible cause is a dirty spark plug, which you can clean or replace. If these steps don't resolve the issue, the carburettor jets might be dirty, or there could be a fault in the ignition system, requiring assistance from authorised BETAMOTOR customer service.
S
smithmaryAug 25, 2025
Why is my Beta EVO 4T engine power insufficient?
- E
  Evan MartinezAug 26, 2025
  If your Beta Motorcycle engine isn't delivering enough power, start by checking the tank vent for obstructions. Also, inspect the air filter and clean it if it's dirty. If these steps don't help, the fuel system might be dirty, or there could be a defective ignition system, in which case you should contact authorised BETAMOTOR customer service.
A
Amy BuckAug 28, 2025
What to do if Beta EVO 4T engine overheats and liquid flows out of the radiator?
- M
  Misty MyersAug 28, 2025
  If your Beta Motorcycle engine is overheating, with liquid or vapor coming from the radiator vent, several factors could be responsible. Begin by checking the radiator grill and the radiator itself for any blockages, and clean them if necessary. Ensure that the cooling fan is functioning correctly. Contact authorised BETAMOTOR customer service if the silencer is partly clogged or the carburation is too lean.
R
Rick RiveraAug 30, 2025
Why does my Beta EVO 4T motor stop or sputter?
- K
  kingfrankAug 30, 2025
  If your Beta Motorcycle motor stops or sputters, it could be due to a few reasons. First, ensure you have enough fuel and that the fuel cock is set to 'A'. Also, check the connector, and clean and treat with specific spray if it is loose or oxidized. Finally, make sure that the sleeve between carburetor and engine is intact.
J
Jennifer HarringtonSep 2, 2025
What causes poor front braking on a Beta Motorcycle?
- B
  Brian BennettSep 3, 2025
  If the front braking on your Beta Motorcycle is poor, it could be due to worn brake pads or air/humidity in the hydraulic circuit. In both cases, contact authorised BETAMOTOR customer service.
M
Michelle JohnsonSep 5, 2025
Why is the rear braking on my Beta EVO 4T Motorcycle poor?
- T
  Theresa MacdonaldSep 5, 2025
  If the rear braking on your Beta Motorcycle is poor, it might be caused by worn brake pads or air/humidity in the hydraulic circuit. For both these issues, contact authorised BETAMOTOR customer service.
R
Ricardo FranklinSep 8, 2025
How to start a Beta Motorcycle if the engine turns over but won't start?
- S
  Stephen MoralesSep 8, 2025
  If your Beta Motorcycle's engine turns over but doesn't start, it could be due to several reasons. First, check if the fuel cock is in the 'C' position and turn it to the 'A' position. Another possible cause is a dirty spark plug, which you can clean or replace. Also, the spark gap might be wrongly adjusted; in this case, restore the spark gap.
S
shannonwilliamsSep 12, 2025
Why is the power delivered by my Beta EVO 4T Motorcycle engine insufficient?
- A
  Allison WatsonSep 12, 2025
  If your Beta Motorcycle engine isn't delivering sufficient power, the tank vent might be obstructed, so check the tank vent. Also, a dirty air filter can cause this issue, so clean the air filter.

Summary

Chapter 1 General Information

Vehicle Specifications

Front Suspension Specifications

Rear Suspension Specifications

Engine Specifications

Carburetor Settings

Gearbox Specifications

Electrical System Diagram (Homologated)

Wiring diagram for the homologated version of the motorcycle.

Legend for Homologated Electrical Diagram

Electrical System Diagram (Race)

Wiring diagram specific to the race version of the motorcycle.

Legend for Race Electrical Diagram

Recommended Lubricants and Liquids

Chart specifying recommended engine oil, brake fluid, and coolant.

Chapter 2 Operation

Checks Before and After Use

Essential pre-ride and post-ride checks for safe operation and vehicle longevity.

Breaking-In Procedure

Fuelling the Motorcycle

Instructions and safety precautions for refueling the vehicle.

Engine Startup

Procedures for starting the engine (cold/hot) and post-start actions.

Engine Shut-down

Chapter 3 Adjustments

Brake Adjustments

Instructions for adjusting front and rear brake lever positions and pedal height.

Clutch Adjustment

Procedure for adjusting the clutch lever play and push rod stroke.

Accelerator and Throttle Adjustment

Adjusting idle speed, throttle cable play, and checking handlebar rotation.

Front Fork Rebound Damper Adjustment

How to adjust the extension phase damping of the front fork.

Rear Shock Absorber Adjustments

Adjusting the rebound damper and spring preload on the rear shock absorber.

Suspension Adjustment by Rider Weight

Table showing approximate suspension adjustment based on rider's weight.

Chapter 4 Checks and Maintenance

Engine Oil Check

Procedure for checking the engine oil level.

Engine Oil Replacement

Steps for draining and refilling engine oil.

Coolant Check

Procedure for checking the coolant level.

Coolant Replacement

Steps for draining and refilling coolant.

Air Filter Removal and Fitting

Procedure for removing and fitting the air filter.

Air Filter Cleaning

Spark Plug Check

Front Brake Fluid Check

Bleeding the Front Brake

Rear Brake Fluid Check

Bleeding the Rear Brake

Clutch Control Oil Level Check

Bleeding Clutch Control

Steering Gear Play Check

Tyre Safety and Pressure

Chain Maintenance

Scheduled Maintenance

Tightening Torque Overview

A table listing tightening torques for various vehicle components.

Chapter 5 Troubleshooting

Troubleshooting Guide

Common problems, their causes, and recommended remedies.

Beta EVO 4T Specifications

General

Cooling System	Liquid cooled
Transmission	6-speed
Ignition	Electronic
Clutch	Wet multi-disc
Frame	Aluminum
Front Tire	2.75-21
Rear Tire	4.00-18
Engine Type	Single cylinder, 4-stroke
Front Suspension	Hydraulic fork
Rear Suspension	Monoshock
Front Brake	Disc
Rear Brake	Disc
Fuel Capacity	2.5 L
Fuel System	Carburetor
Wheelbase	1, 320 mm