If you choose to undertake fixes on your own Hyosung T250R then it is usually recommended to own a Workshop Manual to use as a guide in case that you want to know proven methods to remove a specific part such as the Exhaust and match it again correctly.
Hyosung T250R Workshop Manuals are able to offer targeted diagnostic guides for the automobile so if something is not working it will help you determine what the situation is and tips on how to correct it. Then you are able to analyse if you can do this yourself or in case the job is just too big it is possible to make a reservation for your T250R in to a nearby mechanic.
Hyosung T250R manual