1. 1 Common motorcycle types and brands

1. 1. 1 motorcycle type

1. 1.2 compilation of motorcycle model

1. 1.3 introduction of typical motorcycles

1.2 motorcycle structure

1.2. 1 engine parts

1.2.2 transmission system

1.2.3 control system

1.2.4 walking system

1.2.5 electrical instrument system

1.3 motorcycle maintenance tools and measuring tools

1.3. 1 common tools

1.3.2 Common measuring tools

Chapter II Maintenance of Engine

2. 1 Disassembly and assembly of engine parts

2. 1. 1 Precautions for engine disassembly and assembly

2. 1.2 Remove the engine from the frame.

2. 1.3 disassembly and assembly of main engine components

2. 1.4 disassembly and assembly of oil pump

2. 1.5 disassembly and assembly of carburetor

2.2 engine inspection and adjustment

2.2. 1 Inspection and adjustment of valve train

2.2.2 Inspection and adjustment of fuel supply system

2.2.3 Inspection and adjustment of lubrication system and cooling system

2.3 Maintenance of Engine Parts

2.3. 1 cylinder head maintenance

Maintenance of piston assembly

2.3.3 Maintenance of crankshaft and crankcase

Connecting rod assembly

Maintenance of oil pump

Maintenance of air filter

2.4 engine fault diagnosis and elimination

2.4. 1 The engine is difficult to start or cannot be started.

2.4.2 Automatic engine flameout

Engine overheating

2.4.4 Insufficient engine power

2.4.5 The exhaust pipe of the engine emits black smoke.

2.4.6 There is abnormal sound when the engine is running.

2.4.7 The engine is not idling.

2.4.8 Engine idling is unstable.

2.5 Typical examples of automobile engine maintenance

Example 1 Jincheng J C 125 The motorcycle can't start when the engine is turned off.

Example 2 Chongqing Yamaha CY80 motorcycle engine can't be started.

Example 3 After cleaning the carburetor, the engine is difficult to start, the fuel consumption is too high, and the acceleration performance is poor.

Example 4 The starting lever of Zongshen 90 motorcycle bounces when driving in 1 gear, and all other gears are normal.

When the vehicle is running, the exhaust muffler emits blue smoke.

Example 6 Suzuki GS 125 engine automatically shuts down and cannot be started again.

Example 7 The air-cooled scooter has abnormal noise on the cylinder head when driving.

Chapter III Maintenance of Transmission System

Chapter IV Maintenance of Drive System and Control System

Chapter V Maintenance of Electrical Equipment

refer to