Maintaining a bike is like maintaining your own body.
The air pressure of the bike should be regularly checked.
Cleaning of the bike is done on a daily basis.
Battery should be properely checked by time to time.
Polishing of the bike is done minimum once a week.
Clutch adjustments and transmission system should also be checked.
Oil of the engine of the bike is also checked by time to time.
Proper suggestive measures as provided by company should also be taken into consideration.