For 1982 the XJ650 is recorded simply as XJ650, and the service publication is LIT-11616-XJ-60, the book Yamaha maintained for 1980 through 1982 including the Maxim.
It is the dealer text, not a rewrite of it. Engine and gearbox work is given in assembly order with torque values at each fastener; carburettors have their specified settings and synchronisation method; brakes, forks and final drive each have their own procedures; and the electrical chapter carries the complete wiring diagrams needed for real diagnosis.
Since the code for this year is unsuffixed, check the year on your title or compliance label as well as the frame plate before ordering.
Capacities, lubricant grades and the original service intervals are all stated, and troubleshooting is arranged by symptom. The manual is the factory text as issued, not a condensed version of it.
