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General| Fuel System | Carburetor |
|---|---|
| Front Suspension | Telescopic fork |
| Front Brake | Disc |
| Engine | Single cylinder, 4-stroke |
| Cooling | Air cooled |
Safety precautions for operating the motorcycle and handling materials.
Hazards and precautions related to carbon monoxide exhaust gas.
Safety guidelines for handling gasoline and working in ventilated areas.
Precautions for handling and charging the motorcycle battery.
Technical specifications for the QJ50T-21T motorcycle model.
Step-by-step guide for diagnosing engine starting issues.
Procedure for diagnosing engine overheating issues.
Procedure for diagnosing an underpowered engine.
Diagnosing and resolving issues with unstable engine idle speed.
Diagnosing and resolving excessive fuel consumption issues.
Diagnosing and resolving clutch slipping issues.
Diagnosing and resolving issues with the hydraulic disc brake system.
Diagnosing and resolving issues with the drum brake system.
Diagnosing why the storage battery is not charging.
Diagnosing the cause of an undercharged storage battery.
Diagnosing why the starter motor fails to rotate.
Diagnosing why the starter motor rotates weakly.
Diagnosing why none of the motorcycle lamps are working.
Diagnosing why the steering lamps are not functioning.
Diagnosing why the electric horn is not working.
Diagnosing why the brake lamp is not functioning.
General safety warnings and precautions for maintenance.
Specifications related to the motorcycle's engine performance and parameters.
Specifications related to the motorcycle's frame, brakes, and wheels.
Schedule for routine maintenance and inspection items with applicable tools.
Procedures for checking and replacing engine oil and oil filter.
Procedures for replacing and checking the air filter element.
Procedures for removing, inspecting, and checking the spark plug.
How to measure and adjust the spark plug gap.
How to inspect the battery's charging state using a voltmeter.
Method for connecting and charging the motorcycle battery.
Procedures for adjusting the engine's idle speed.
How to measure cylinder pressure and what to check for low pressure.
How to inspect and add brake fluid to the correct level.
How to check the working condition of the clutch and replace clutch blocks.
How to check the tyre and rim for damage and check tyre pressure.
Table listing torque values for fixing components in the electrical system.
Diagram illustrating the charging system components and wiring.
Documents and notes required for battery and charging system work.
Symptoms and causes of power supply failure.
Symptoms and causes of power supply failure.
Step-by-step guide for removing the battery, including warnings.
Method for connecting and charging the motorcycle battery.
Diagram showing the charging system components and wiring.
Procedure for testing the charging system for short circuits.
How to inspect the charging system's voltage and current output.
Diagram showing the ignition system components and wiring.
Notes and standards for preparing ignition system checks.
General notes on inspecting the ignition system.
Detailed table diagnosing ignition coil, secondary voltage, charging coil, and trigger issues.
How to measure the primary voltage of the ignition coil.
How to measure the primary voltage of the ignition coil.
Diagram illustrating the activation system components and wiring.
Notes and preparation standards for the activation system.
Lists activation failures and their potential causes.
Information on removing, breaking down, and inspecting the starting motor.
Common failure points for bulbs, switches, and meters.
Specifications and diagrams for the front hydraulic brake system.
Specifications and diagrams for the rear hub brake system.
Precautions and specifications for brake maintenance.
Diagnosing poor braking performance.
Tire and rim specifications, including certification numbers.
Torque values for front suspension bolts and ball amounts.
Torque values and free stroke specifications for the direction handle.
Precautions and vehicle standards for front wheel and suspension work.
Diagnosing issues related to direction handle, wheel swing, and muffler sounds.
Steps for removing and checking the front wheel.
Diagrams and torque values for the rear wheel and suspension components.
Precautions and standards for rear wheel and suspension work.
Diagnosing rear wheel swing and muffler issues.
Steps for removing the rear wheel.
Precautions and standards for tank and seat cushion work.
General overview of engine check and maintenance procedures.
Diagram of the lubrication system components.
Precautions and standards for the lubrication system.
Diagnosing issues with machine oil amount and engine burning oil.
Diagram of carburetor components and their functions.
Precautions, function, and standards for the carburetor.
Diagnosing carburetor issues like bad start or unstable idle.
Attentions and functions related to the cylinder cover.
Diagnosing cylinder cover issues like air leaks or warp.
Diagram of cylinder block and piston components.
Attentions and functions of cylinder block and piston.
Diagnosing common failures related to low compression pressure and piston issues.
Steps for disassembling the piston and piston rings.
Diagram showing the driving plate, clutch, and driven wheel components.
Diagnosing failures related to the driving plate, clutch, and driven wheel.
Diagram and function of the reduction gear assembly.
Diagnosing issues with the speed reducer where the vehicle cannot move.
Steps for disassembling the gearbox cover.
Diagram of crankcase components and notes on handling.
Diagnosing odd voices and loose bearings within the crankcase.
Electrical schematic diagram for the QJ50T-21T motorcycle.
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