If you wish to do fixes on your Honda Monkey then it will always be a great idea to have a Workshop Manual to keep just for a reference in the event that you need to know how you can take off a particular part such as the Gearbox and fit it again safely.
Honda Monkey Workshop Manuals gives you detailed diagnostic guides for the vehicle so if something is playing up it will help you discover what the situation is and how you can make it better. After that you can decide if you can do this on your own or if ever the job is simply too big you can actually make a reservation for your Monkey into a nearby repair garage.
Honda Monkey manual