If you want to perform repairs on your Honda SH 125i then it is usually a good idea to possess a Workshop Manual to use as reference should you need to know simple methods to take off a specific part much like the Door and match it again safely.
Honda SH 125i Workshop Manuals will give identifiable diagnostic wisdom for the vehicle therefore if something is faulty it helps you figure out what the situation is and the best way to resolve it. You can then analyse if this can be achieved yourself or in the event the job is too big you can actually make a reservation for your SH 125i right into a nearby car garage.
Honda SH 125i manual