If you choose to undertake fixes on your own Suzuki GS 125 ES then it is usually a good plan to possess a Workshop Manual to keep just for personal reference in the event that you want to know the way to strip off a particular component including Wheel and match it again effectively.
Suzuki GS 125 ES Workshop Manuals are able to offer particular diagnostic information for the car therefore if something is not working it will help you determine what the problem is and the way to correct it. You will be able to determine if you can do this yourself or if ever the job is too big you can actually make a booking for your GS 125 ES right into a nearby repair garage.
Suzuki GS 125 ES manual