1977 Yamaha DT250 Service and Repair Manual

One volume, two displacements. LIT-11616-01-44 is the factory service manual for the 1977 DT250D and it documents the DT400 in the same binding, across the 1977 and 1978 model years.

Match DT250D on your frame plate. Where the 250 and the 400 differ, the book gives both figures, so nothing is lost by the shared coverage.

Practical contents

• Engine work in the factory sequence, with inspection limits
• Torque specifications for the fasteners that matter
• Carburettor and ignition settings
• Suspension, brake and wheel procedures
• Wiring diagram and electrical testing
• Troubleshooting by symptom

If you are setting up a bike that has been sitting, the value is in the specification pages: clearances, jetting and timing given as Yamaha specified them, rather than whatever the previous owner settled on.