If you need to perform maintenance to your Honda Dio Cesta then it will always be recommended to have a Workshop Manual to keep just for a guide should you want to know simple methods to remove a specific component like the Door and install it again in the correct way.
Honda Dio Cesta Workshop Manuals offer you certain diagnostic guides for the car or truck therefore if something is wrong it helps you find out what the issue is and methods to fix it. Then you are able to evaluate if this can be done on your own or that the job is too big you could make a reservation for your Dio Cesta in to a local friendly mechanic.
Honda Dio Cesta manual