Simon has kindly pointed you in the direction of the service schedule
Looks pretty straight forward
Check the tyre pressure weekly and condition of the tyres ( for nails 'screws 'cracks)
Clean & Lube the chain approx every 200 Miles clean with Kerosene ( paraffin ) & old toothbrush then dry with a clean rag & lube with Gearbox oil EP90
Drip the oil on to each of the links and rollers and leave to soak for a couple of hrs ( might want to put a piece of cardboard underneath ) then wipe with old rag
If you have a center stand I usually run the bike in gear to let any excess oil sling off then clean off the rear tyre of excess oil
Change Engine Oil & oil filter every 6000 miles 10W40 oil
Replace spark plugs +change the air filter every second service 12000 miles
Others will be along to add to the basic maintenance