1982 Yamaha YZ125J Owners Tuning / Service Manual

Description

This 1982 Yamaha YZ125J Owner’s Tuning and Service Manual is a reproduction of the 1982 Yamaha YZ125J Motorcycle Owners Tuning and Service Manual.  This manual provides detailed service information, step-by-step repair instruction and maintenance specifications for 1982 Yamaha YZ125J two stroke motocross bikes.

Table of Contents
General Information
Machine Identification
Frame Serial Number
Engine Serial Number
Control Functions
Fuel Oil And Coolant
Fuel
Engine Mixing Oil
Transmission Oil
Coolant Level
Fender Plate
Pre-operation Checks
Starting And Break-In
Starting A Cold Engine
Starting A Warm Engine
Break-In Procedures
Cleaning And Storage
Cleaning
Storage

Regular Maintenance And Adjustment
Maintenance Intervals Chart
Lubrication
Special Tools
Dial Gauge
Dial Gauge Stand
Dial Gauge Extension
Steering Nut Wrench
Fork Cylinder Holder And Adapter
Clutch Holding Tool
Crankcase Separating Tool
Crankshaft Installing Tool
Spacer
Crankshaft Installing Bolt And Adapter
Rotor Puller
Minor Maintenance And Adjustments
Spark Plug
Ignition Timing
Throttle Cable
Idle Speed
Air Filter
Clutch
Front Brake
Rear Brake
Drive Chain
Steering Head
Tire Air Pressure
Tuning Guidance
Spokes

Suspension Tuning
Introduction
Front Fork
Fork Oil Replacement
Fork Oil Weight
Fork Oil Level
Fork Spring
Fork Clamp Position
Air Pressure
Rear Shock
Spring Preload
Shock Spring
Rebound Damping
Compression Damping
Nitrogen Pressure
Determining The Proper Settings
Standard Settings
Front And Rear Compatibility
Troubleshooting Improper Settings
General Symptoms And Remedy
Standard Setting Table

Engine Maintenance And Repair
Preparation For Service
Disassembly Inspection And Assembly
Carburetor
Inspection
Tuning Guidance
Reed Valve
Power Valve System
Muffler
Cylinder Head
Cylinder
Piston Assembly
Clutch
Kick Starter
Shifter
Crankcase
Transmission
Crankshaft
Cooling System
Coolant Draining
Replenishing Coolant
Cooling System Check
Water Pump
Disassembly
Inspection
Reassembly

Chassis Maintenance And Repair
Wheels
Front Wheel Removal
Rear Wheel Removal
Wheel Installation
Rims And Spokes
Bearings
Brake Shoe Inspection
Brake Drum
Sprockets And Chain
Front Fork
Disassembly And Inspection
Reassembly
Steering Head
Disassembly
Checking The Pipe Joint
Inspection
Reassembly
Rear Shock
Removal
Notes On Disposal
Swingarm
Inspection
Swingarm Assembly Diagram

Electrical Troubleshooting
Ignition System Wiring Diagram

Appendices
Troubleshooting Guide
Engine Is Hard To Start
Poor High Speed Performance
Overheat
Transmission And Shifter
Clutch
Chassis
Specifications
General
Engine
Chassis
Electrical
Tightening Torque
Conversion Tables
Cable Routing Diagram
Warranty Information