Longjia 3J4 Manuals

Manuals and User Guides for Longjia 3J4. We have 1 Longjia 3J4 manual available for free PDF download: Service Manual

Longjia 3J4 Service Manual

Longjia 3J4 Service Manual (81 pages)

4-STROKE 125cc

Brand: Longjia | Category: Motorcycle | Size: 3 MB

Table of Contents

Table of Contents

2
- Specification / Troubleshooting
  3
Maintenance Information

11
- Periodical Maintenance Schedule
  12
- Cleaning the Oil Strainer
  13
- Lubrication System
  13
- Fule System
  14
- Gear Oil
  14
- Air Cleaner
  15
- Valve Clearance Adjustment
  15
- Check Electronic Fuel Injection System
  16
- Crankcase Blow-By over Flow Pipe
  16
  - Ignition Timing
    17
  - Spark Plug
    17
- Valve Clearance Inspection and Adjustment
  16
- Left Cover Filter
  17
- Cylinder Copmression Pressure
  18
- Driving System
  18
  - Driving Belt
    18
Lubrication System

19
- Important Information
  20
- Cleaning Engine Oil Strainer
  21
- Engine Oil
  21
- Oil Pump Removal
  22
- Oil Pump Inspection
  23
- Oil Pump Re-Assembly
  23
- Oil Pump Installation
  24
- Gear Oil
  25
- Fuel System
  26
  - Troubleshooting
    26
- Removal of Engine
  29
  - Removal of Engine Hanger Bush
    33
  - Installation of Engine
    34
Table of Contents

35
- Cylinder Head / Valve
  36
- Important Information
  36
- Troubleshooting
  37
- Camshaft Removal
  38
- Camshaft Inspection
  39
- Measure the Valve Rocker Arm I.D
  39
  - Cylinder Head Disassembly
    40
  - Cylinder Head Inspection
    41
- Valve Guide
  41
- Valve Seat Inspection and Service
  42
- Camshaft Installation
  43
- Cylinder Head Installation
  43
- Install the Lock Pins
  44
- Valve Clearance Adjustment
  44
Table of Contents

45
- Cylinder / Piston
  46
- Important Information
  46
- Cylinder Removal
  47
- Piston Removal
  49
- Piston Ring Installation
  51
- Cylinder Installation
  52
- Piston Installation
  52
Table of Contents

53
- Important Information
  54
  - General Information
    54
- Kick Starter Arm
  55
- Left Cover Filter
  55
- Drive Belt
  56
- Driven Pulley Installation
  57
- Drive Pulley
  58
- Drive Pulley Assembly / Installation
  59
- Drive Pulley Inspection
  59
Transmission Gear Box

61
A.C. Generator / Starting Clutch

67
- A.C.generator Removal
  68
- Flywheels Disassemble
  68
- Remove A.C. Generator Stator
  69
- Right Crankcase Cover Removal
  69
  - Starting Clutch
    70
- One-Way Clutch Disassembly
  71
- Inatall A.C. Generator Stator
  73
- Install the Cooling Fan
  74
- Crnkcase & Crankshaft
  75
  - Specification
    76
  - Disassembly of Crankcase
    77

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