Part number LIT-11626-03-16 is what Yamaha assigned to the 1982 YZ125 service manual. The bike is model code YZ125J, and the book covers 1982 only.
Inside, the structure is the familiar factory one. Work is presented in the order it should be done, each assembly gets an inspection step with the service limit printed beside it, and reassembly comes with torque figures rather than a suggestion to tighten firmly. Ignition, carburation, suspension and the electrical system each have their own specifications and, for the wiring, a diagram.
Owners restoring an early eighties YZ often find previous repairs done to no specification at all. Having the original numbers is how you find those and put them right. Check that your frame label reads YZ125J so the manual matches the machine.
