For 1980 the XS360 carries code XS360G, documented in Yamaha publication LIT-11616-XS-42 alongside the XS400 and XS400 Special II, across 1976 to 1982.
The book is the dealer service text: torque figures and clearance limits in tables, periodic maintenance intervals, engine and transmission overhaul in sequence, carburettor service and synchronisation, chassis and brake procedures, and full wiring diagrams with symptom-led troubleshooting.
Because several models share it, the first job is confirming which specifications are yours. Check the code on the frame plate against XS360G, then work from the sections that name your machine and year.
Capacities, lubricant grades and adjustment ranges are listed with the specifications, and the maintenance chapter gives Yamaha's original intervals. None of it is described at length; it is stated, in the form a dealer technician needed it.
