If you need to undertake auto repairs on your Suzuki GT 125 then it is usually a good plan to own a Workshop Manual to use as a guide just in case you want to know how to strip off a certain component much like the Brake Discs and match it again successfully.
Suzuki GT 125 Workshop Manuals will give detailed diagnostic guides on your automobile therefore if something is wrong it can help you figure out what the situation is and some ways to correct it. You can then assess if this can be achieved yourself or if ever the job is just too big you could book your GT 125 right into a decent garage.
Suzuki GT 125 manual