The Owners Manual for most bikes (postwar) would have shown a basic maintenance chart - usually about 40 points that either need the oil changing, a drop of oil, regular geasing or some other form of lube or adjustment. Along with a list of how often these need doing - eg engine oil every 1000 miles, gearbox oil 2000, wheel bearings every 10,000 miles, cables lubed every year, gease lube points monthly, etc etc etc.
Military (WW2) bikes had quite good charts, aimed at covering EVERYTHING that needed doing - find one of these and follow it, if your bikes doesn't have such, and you can't go far wrong.
By the time you follow these, and note any parts falling off, leaking oil making funny noises or out of adjustment, it will all be old hat.... Hopethishelps.
