TGB BR8 User Manual (English)

Susan HunterJul 29, 2025

What to do if my TGB Scooter engine does not start?

S
sarahmartinezJul 30, 2025
If your TGB Scooter's engine isn't starting, begin by inspecting the crankshaft and starting motor to ensure they are functioning correctly. Verify the battery is adequately charged and address any carburetor speed clutch issues. Also, check for contaminants in the fuel, examine the carburetor float for leaks, and inspect the fuel filter and tubing. If necessary, recharge the battery and ensure all battery connections are secure. Inspect the starting switch and consider replacing the spark plugs.

Brand	TGB
Model	BR8
Category	Scooter
Language	English

Brand

TGB

Model

BR8

1. General Information

1-1 Specifications

Detailed technical specifications for the motorcycle model.

1-2 Inspection Precautions

Guidelines for inspecting motorcycle components before maintenance.

1-3 Safety Precautions

Essential safety measures to follow during motorcycle operation and maintenance.

1-4 Special Tools

List and description of specialized tools required for maintenance.

1-5 Tightening Torque

Specifications for tightening torque of various bolts and chassis components.

1-6 Lubrication Points

Diagram and list of lubrication points on the motorcycle chassis.

1-7 Parts Name and Wiring Diagram

Identification of motorcycle parts and a schematic wiring diagram.

1-8 Trouble Shooting

Diagnostic flowcharts for common operational issues.

2. Inspection and Adjustment

2-1 Regular Maintenance Schedule

Scheduled maintenance intervals for optimal motorcycle performance and longevity.

2-2 Inspection and Change of Engine Oil

Procedure for checking and replacing engine oil, including oil filter.

2-3 Final Gear Oil

Steps for inspecting and changing the final gear oil.

2-4 Brake System

Inspection, maintenance, and adjustment procedures for the front and rear brake systems.

2-5 Tire and Tire Pressure

Inspection of tires and guidelines for checking and maintaining correct tire pressure.

2-6 Air Filter

Procedure for inspecting, cleaning, and replacing the air filter.

2-7 Battery

Guidance on inspecting and maintaining the motorcycle battery.

2-8 Spark Plug

Instructions for inspecting, cleaning, and replacing the spark plug.

2-9 Fuel Filter

Procedure for inspecting and replacing the fuel filter.

2-10 Carburetor Idle Speed

Steps for adjusting the carburetor idle speed for optimal engine running.

2-11 Throttle Valve

Procedure for adjusting the throttle lever and cable gap.

2-12 Valve

Inspection and adjustment of intake and exhaust valve clearance.

2-13 Headlight Axle

Procedure for adjusting the headlight beam angle.

2-14 V Belt

Inspection and replacement of the V-belt.

2-15 Cylinder Pressure

Method for measuring cylinder pressure and troubleshooting high/low pressure issues.

3. Removal and Installation of Engine

3-1 Starterd Preparation Data & Simplified Troubleshooting

Engine preparation data for crank, cylinder, piston, and troubleshooting common engine issues.

3-2 Release the Engine

Step-by-step procedure for safely removing the engine from the chassis.

3-3 Installation of the Engine

Steps for reinstalling the engine onto the chassis in reverse order of removal.

3-4-1 Air Cleaner

Procedure for inspecting and cleaning the air filter element.

3-4-2 Spark Plug

Instructions for inspecting, cleaning, and checking the spark plug gap.

3-4-3 Cylinder head and Timing

Inspection of cylinder head, camshaft, and timing alignment.

3-5 Fuel Reed Circuit

Detailed steps for disassembling and servicing the carburetor.

3-6 Lubrication

Procedures for checking and renewing engine oil levels and oil.

3-7 Driving Pully-Clutch-Driven Pulley

Maintenance and inspection of the drive pulley, clutch, and driven pulley assembly.

3-8 Starter Arm

Disassembly, inspection, and assembly of the starter arm mechanism.

4. Chassis

4-1 Removal of Cover

Diagram and sequence for removing chassis body covers.

4-2 Troubleshooting of Chassis

Troubleshooting guide for steering, suspension, wheels, and brakes.

4-3 Front Wheel

Procedure for inspecting and servicing the front wheel, including rim eccentricity.

4-4 Rear Wheel

Procedure for inspecting and servicing the rear wheel and brake lining.

4-5 Rear Shock Absorber

Procedure for inspecting and replacing the rear shock absorber.

5. Electrical System

5-1 Operating Cautions & Troubleshooting

General cautions and troubleshooting for the electrical system components.

5-2 Battery

Guidelines for battery inspection, charging, and maintenance.

5-3 Short Circuit Test

Method for testing electrical circuits for short circuits using a megger meter.

5-4 Rectifier

Inspection and resistance testing of the rectifier component.

5-5 Starter Relay

Procedures for checking the operation, ground circuit, and voltage of the starter relay.

5-6 Starter Motor

Disassembly, inspection, and testing of the starter motor and its components.

5-7 A.C. Generator

Procedure for testing the A.C. generator coils (charging and lighting).

5-8 Resistor

Procedure for measuring the resistance of the resistor component.

5-9 CDI Unit

Inspection and resistance testing of various coils within the CDI unit.

TGB BR8 User Manual

Table of Contents

Questions and Answers:

TGB BR8 Specifications

Summary