Yamaha DT125C 1974 Manuals

Manuals and User Guides for Yamaha DT125C 1974. We have 1 Yamaha DT125C 1974 manual available for free PDF download: Service Manual

Yamaha DT125C 1974 Service Manual (190 pages)

Brand: Yamaha | Category: Motorcycle | Size: 20.69 MB

Section Index
4
General Information
6
Machine Identification
8
Starting Serial Numbers
8
External View
9
Specifications
10
Special Tools and Gauges
19
Point Checker
19
Pocket Tester
19
Electro Tester
19
Periodic Inspections and Adjustments
22
Tools
24
Maintenance Interval Charts
24
Periodic Maintenance
25
Lubrication Intervals
25
Recommended Lubricant Type
25
Engine
27
Carburetor
27
Air Cleaner
27
Autolube Pump
28
Pump Stroke Adjustment
29
Engine and Transmission Oil
30
Clutch
31
Chassis
32
Cylinder Head
32
Fuel Petcock
32
Front Brake and Wheel
32
Rear Brake and Wheel
33
Drive Chain
33
Drive Chain Maintenance
34
Front Fork Oil Change
34
Suspension, Steering and Swing Arm
35
Electrical
36
Contact Breaker Points
36
Ignition Timing
36
Spark Plug
39
Battery
39
Headlight
40
Replacing the Headlight Bulb
40
Engine Overhaul
42
Removal
44
Fuel Tank Assembly
44
Wiring and Cables
45
Change Pedal
46
Flywheel Magneto
46
Reed Valve Assembly
47
Kick Crank
47
Piston Pin and Piston
47
Clutch Assembly and Primary Drive Gear
47
Primary Drive
49
Kick Axle Assembly
50
Change Shaft Assembly
50
Clutch Push Lever Axle
51
Shift Cam Stopper
51
Crankcase
52
Transmission
52
Inspection and Repairing
53
Crankshaft
53
Cylinder
53
Piston Pin and Bearing
54
Piston
54
Piston Rings
55
Kick Starter Assembly
76
Mounting
80
Crankcase Cover, Right
80
Carburetion
82
Hard Starting
91
Poor Performance at Low Speed Operation
91
Poor Acceleration
91
Float Level
92
Front Wheel Removal
98
Front Axle
98
Checking Brake Shoe Wear
98
Brake Drum
99
Checking Speedometer Gear
99
Replacing Wheel Bearings
100
Installing Front Wheel
100
Rear Wheel
101
Installing Rear Wheel
101
DT100C Rear Wheel
102
DT125C, DT175C Rear Wheel
103
Rims and Spokes
104
Tires and Tubes
104
Checking the Loose Spokes
104
Checking Rim "Run-Out"
104
Drive Chain and Sprockets
105
Chain Inspection
106
Chain Maintenance
106
Front Forks Disassembly
107
Front Forks Inspection
108
Front Forks Assembly
109
DT100C/175C Front Fork
110
Steering Head Adjustment
111
Steering Head Disassembly
111
Steering Head Inspection
112
Steering Head Installation
112
Swing Arm Inspection
113
Rear Shock Absorber Removal
114
Rear Shock Absorber Inspection
114
Swing Arm Lubrication
114
Swing Arm Removal
114
Thermal Phase Shocks Operation
115
Thermal Phase Shocks Inspection
115
Shock Absorber Oil Change
115
DT100C Rear Arm
117
DT125C Rear Arm
118
DT175C Rear Arm
119
Cable and Fittings
120
Cable Maintenance
120
DTC175C Handle, Wire
120
DT125C Handle, Wire
121
Throttle Maintenance
122
Cable Junction Maintenance
122
Miscellaneous Chassis Components
123
Fuel Tank
123
Oil Tank
124
Stand/Footrest/Brake Pedal
125
Electrical System for DT100C, DT175C
128
Connection Diagram
131
Ignition System
134
Spark Gap Test
134
Ignition Coil Test
134
Coil Winding Resistance Tests
135
Condenser Test
135
Capacity Test
135
DT100C Flywheel Magneto
136
DT175C Flywheel Magneto
137
Charging System
138
Charging Output Test
138
Checking Silicon Rectifier
141
A.C. Voltage Regulator
142
Lighting and Signal Systems
143
Service Life
143
Lighting Tests and Checks - A.C. Circuit
144
A.C. Circuit Output Test
144
Lighting Coil Resistance Check
144
Lighting Tests and Checks - D.C. Circuit
145
Flasher Relay and Horn
145
DT100C Electrical Components
146
DT175C Electrical Components
147
How to Read Spark Plug
148
Spark Plug Inspection
148
Switches
149
Wire Color Abbreviations
149
Electrical System for DT125C
150
Starting and Charging System
153
Ignition System Description
153
Ignition Timing-Checking and Adjustment
153
Ignition Coil
153
Charging Mode
154
Starting Mode
154
Checking the Dynamo
154
Checking Carbon Brushes
155
Checking the Armature Assembly
155
Checking the Commutator Mice Undercut
156
Dynamo Adjustment Standards
156
Measuring Charging Voltage
157
Regulator (Voltage Regulator)
157
Regulator Maintenance Standards
159
Main Switch
161
Engine Stop Switch
161
Light Switch
161
Flasher Switch
161
Lighting System
162
Light Bulbs and Horn
162
Lighting Tests and Checks
162
Horn Does Not Work
162
High Beam Indicator Light Does Not Work
163
Low Beam Does Not Work
163
DT125C Electrical Components
164
Appendices
166
Troubleshooting Guide
168
No Start or Difficult to Start
168
Engine/Exhaust Systems
168
Poor Idle And/Or Low Speed Performance
169
Poor MID-Range and Poor High Speed Performance
169
Conversion Tables
170
Metric to Inch System
170
Inch to Metric System
171
Millimeters to Inches
172
Inches to Millimeters
172
Torque Specifications
173
Standard Torque Setting
173
Cable Routing Diagrams
174
DT100C Cable Routing Diagram
174
DT125C Cable Routing Diagram
175
DT175C Cable Routing Diagram
178

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Yamaha DT125C 1974 Manuals

Yamaha DT125C 1974 Service Manual (190 pages)

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