1979 Yamaha GT80 Service and Repair Manual

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Code GT80F belongs to the 1979 GT80, and the factory book for it is LIT-11616-GT-81. Yamaha kept one volume for the 1978 through 1981 machines and included the DT80 in it as well.

Start with the frame plate. GT80F confirmed, you can read the specification columns without second-guessing which machine a figure belongs to.

Engine chapters follow the sequence a technician uses, with inspection limits at the points where wear has to be measured rather than estimated. Torque specifications are listed. Ignition timing and carburettor settings are factory values.

Suspension, brake and wheel work each have procedures, and the electrical section brings the wiring diagram together with the tests for the components on it. A symptom-led troubleshooting section is included, which is where most jobs on a machine of this age begin.

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