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Manuals
Brands
Yamaha Manuals
Engine
YDS3
Service manual
Yamaha YDS3 Service Manual
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Disassembly
Inspection
Assembly
Engine Repair Procedure
Service Data
Mechanical Advantages of Yamaha Autolube
Sectional Views of Pumps
Pump Mechanism, General Mechanical Features
Main Parts and Their Function
Oil Passage
Check Ball and Check Ball Spring
Relationship between Plunger Stroke and Throttle Opening
Breather Bolt and Starter Plate
Distributor Plunger Mechanism
Suction Stroke
Delivery Stroke
Autolube Performance
Oil Control
Relationship of Plunger Stroke and Throttle Opening
Gasoline to Oil Ratios
Pump Setting
Inspection and Maintenance
Removing Air from the Pump
Disassembly and Assembly of Oil Pump
Oil Seal Insertion
Check Points after Mounting
Autolube of Characteristics
Troubleshooting
Pump Driving
Carburetion
Air Flow
Gas Flow
Mixture of Gas & Air
Adjustment
Air Leaks
Faulty Parts
Air Cleaner
Adjustment of the Cutaway on the Throttle Valve
Adjustment of Jet Needle
Adjustment of the Main Jet
Points of Importance When Adjusting
Choosing the Right Spark Plug
Various Aspects of Firing Ends of Spark Plugs
When Your Plug Is Fouled
When Your Plug Causes Overheating
Installation of Spark Plugs
How to Install a Plug
Adjustment of Spark Plug
Cleaning of Plugs
Spark Plug Comparison Chart
Conversion Formulas
Electrical Components
Principles & Tests
Generator
D.C. Dynamo with Self-Exciting Fields
Maintenance
Electrical Tester Use
Magneto
Principles of Ignition and Lighting Systems
Ignition
Ignition Coil
Primary Ignition Coil
Starter, Integral with Generator
Starter Coil
Regulator
Electrical Adjustment
Related Precautionary Measures
Cut-Out Relay
Adjusting Arm
Battery
Recharging the Battery
Maintenance of Battery
Operating Instructions
Connection of Power Source
Voltage of Power Source
Measurement of Resistance
Condenser Test
Overload Voltage Test
Measurement of Voltage Regulator Output
Condition of Contact Points with a Faulty Condenser
Measurement of Current
Continuity Test
Test of Ignition Coil
Timing Light
Starter Test
Rectifier Checker
How to Check the Rectifier
Voltage Drop Test
Table of Specifications - Battery
Mechanical Measuring Devices
Outside Micrometer
Example of the Reading
Inside Micrometer
Depth Micrometer
Vernier Caliper
Depth
How to Use the Dial Gauge
Cylinder Gauge Metric
How to Use the Cylinder Gauge
General Considerations for Tuning 2-Cycle Engines
Gas Pressure and Torque
Compression Ratio
Changing Port Timing
Tuning Exhaust Passages
Numerical Example
Exhaust Gas Pressure Diagram
Reducing Mechanical Loss
Reducing Oil Viscosity Loss
Gear Ratio Selection
Tuning Tips
Tuning the YG1 for Speed
Right Crankcase
Carburetor Cap and Cap Plate
Muffler
Secondary Reduction Sprocket Ratio Modification
Gear Change Arm
Front Fork Modification
Rear Suspension Unit Modification
Tire Modification
Other Modifications to Frame
Electric Equipment Modification
Special Service Data for Tuning
Cylinder Head
Modification of Standard Cylinder Head
Piston and Piston Rings
Rotary Valve
Valve Cover
Carburetor
Crankcase Right
Right Crankcase Cover
Carburetor Cover
Clutch Spring Modification
Secondary Reduction Sprocket Ratio
Gear Change Arm with Pedal
Left Crankcase Change
Kick Crank
Front Wheel Modification
Rear Wheel Modification
Front Fork
Rear Suspension Unit
Tuning the YJ1 for Speed
Piston
GYT Valve
MOD Valve
Carburetor Chamber Cover
Secondary Reduction Ratio
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Summary of Contents for Yamaha YDS3
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