If you choose to perform maintenance on your Suzuki GN250 then it will always be a good plan to own a Workshop Manual for personal reference if you need to know simple methods to take off a particular component for example Exhaust and install it again successfully.
Suzuki GN250 Workshop Manuals can provide particular diagnostic facts on your vehicle so if something is not working it will help you understand what the situation is and the best way to make it better. Then you are able to analyse if this can be achieved by yourself or if ever the job is just too big you are able to book your GN250 into a trusted car garage.
Suzuki GN250 manual