If you need to execute fixes for your Honda Dio Super then it is always a good plan to have a Workshop Manual to use as personal reference in the event that you need to know simple methods to take off a particular component for example Gearbox and fit it again in the correct manner.
Honda Dio Super Workshop Manuals offer you precise diagnostic information for the vehicle therefore if something is not working it helps you find out what the situation is and the best way to repair it. You can then analyse if this can be achieved by yourself or if ever the job is just too big you can book your Dio Super into a suitable mechanic.
Honda Dio Super manual