The code is what identifies this one: XS650SJ, model year 1982. Yamaha documented it in LIT-11616-02-90, a volume written to serve both the 1982 and 1983 machines.
Because Special appears on several Yamaha models across several decades, the code and the part number together are the only dependable way to confirm you are buying the right book.
Contents
Specified tightening torques, service and wear limits, disassembly and reassembly in factory order, complete wiring diagrams, and fault-finding routines that begin from the symptom and narrow through measurement. Written for the dealer network, so it states figures plainly and assumes you can handle the tools.
Two model years in one book also means any mid-run revision is recorded rather than left out.
