If you wish to accomplish auto repairs on your own Suzuki DR 250 then it is usually a good idea to own a Workshop Manual to use as a reference should you want to know tips to take off a certain component including Exhaust and match it again adequately.
Suzuki DR 250 Workshop Manuals offers clear precise diagnostic info for the vehicle therefore if something is playing up it helps you understand what the issue is and how you can repair it. You will be able to assess if this can be achieved yourself or if ever the job is too big you can actually book your DR 250 in with a local garage.
Suzuki DR 250 manual