Yamaha JT1 Series - User Manual

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-~-tr::c';:}';.;·· .. :''= · • YAMAHA
JT1---JT2
SERIES · . · ·
. SERVICE -
MANUAL·

Summary

Chapter 1 General

1-3 Specifications & Performance JT2

Lists detailed specifications and performance data for the JT2 model.

Chapter 2 Yamaha Autolube System

2-3 Handling the Oil Pump

Provides guidance on handling, checking, and adjusting the oil pump assembly.

2-3-1 Checking Minimum Pump Stroke

Details the procedure for checking the minimum stroke of the oil pump.

Chapter 3 Engine

3-1 Engine Removal

Provides a step-by-step guide for removing the engine from the motorcycle frame.

3-2 Cylinder Head

Details the removal, inspection, and cleaning of the cylinder head.

3-3 Cylinder

Covers cylinder removal, wear checking, and reconditioning procedures.

3-5 Piston Ring

3-6 Piston

3-9 Clutch

3-17 Crankshaft

Covers the crankshaft's precision nature, removal, installation, and inspection.

Chapter 4 Chassis

4-1 Front Wheel

4-2 Rear Wheel

4-5 Front Fork Removal

Chapter 5 Electrical System

5-3 Ignition System-Function and Service

5-4 Ignition Timing

5-7 Charging System

Appendix III: Lubrication Intervals

Appendix IV: Pre-Operation Check Chart

Torque Specifications

Wiring Diagram (JT2)

Yamaha JT1 Series Specifications

General

Fuel System	Carburetor
Final Drive	Chain
Front Suspension	Telescopic fork
Rear Suspension	Swingarm
Front Brake	Drum
Rear Brake	Drum
Starting System	Kick
Engine Type	2-stroke, single cylinder