If you choose to execute maintenance tasks to your Honda NX 125 Trans City then it will always be a good idea to own a Workshop Manual to use as a reference if perhaps you need to know the way to remove a specific component such as the Wheel Bearing and install it again accurately.
Honda NX 125 Trans City Workshop Manuals will provide you with exact diagnostic guides for the vehicle so if something is broken it will help you identify what the situation is and easy methods to fix it. Then you are able to evaluate if this can be achieved on your own or in case the job is too big you can actually make a reservation for your NX 125 Trans City into a suitable repair garage.
Honda NX 125 Trans City manual