1979 Yamaha YZ250 Service and Repair Manual

LIT-11626-01-33 is the Yamaha service manual for the 1979 YZ250, a bike built as model code YZ250F. It covers the one model year.

Late seventies YZs were revised hard every season, which is exactly why the year-specific manual matters. Clearances, jetting references, timing and torque figures moved from year to year, and a book from an adjacent season will read plausibly while giving you the wrong numbers. The frame label is the arbiter; YZ250F points here.

What you will use most on a restoration are the inspection chapters, with their measurement points and service limits, and the assembly sequences with their torque tables. Beyond those sit the carburettor and ignition specifications, the suspension figures and the wiring diagram as drawn for the period electrics.