1981 Yamaha IT250 Service and Repair Manual

Two capacities, one book. LIT-11626-02-56 is the factory service manual for the 1981 IT250, code IT250H, and it documents the IT465 in the same volume.

That pairing reflects how much the two machines shared. Where they differ, the specification tables give each model its own figures, so confirm IT250H on the frame plate and read the column that matches.

Coverage is the full factory set: engine removal and teardown in sequence, inspection against published wear limits, reassembly to specified torque, carburation and ignition settings, and detailed suspension work. Brakes, wheels and controls follow.

The electrical chapter supplies the wiring diagram and the test values for the ignition components. Troubleshooting is grouped by observable fault, which is how a machine that has been raced and stored tends to be approached now.