If you wish to perform fixes on your own Suzuki GR 650 then it is always a great idea to own a Workshop Manual to use as a reference in case you need to know the best way to take out a certain part for instance the Door and fit it again safely.
Suzuki GR 650 Workshop Manuals will give you specified diagnostic info with regards to your car or truck therefore if something is wrong it will help you understand what the situation is and tips on how to repair it. After that you can evaluate if you can do this by yourself or if ever the job is too big you are able to make a booking for your GR 650 into a nearby garage.
Suzuki GR 650 manual