If you have to carry out repairs on your Honda Metropolitan then it is always recommended to have access to a Workshop Manual for reference in case you want to know tips to strip off a specific part for instance the Brake Pads and install it again adequately.
Honda Metropolitan Workshop Manuals will give specific diagnostic guides for the car so if something is broken it will help you determine what the situation is and tips on how to resolve it. Then you are able to determine if this can be achieved by yourself or in case the job is simply too big you could make a booking for your Metropolitan in to a decent repair garage.
Honda Metropolitan manual