If you need to accomplish auto repairs to your Gilera GP 800 then it is always a good plan to own a Workshop Manual to use as reference in case you want to know proven methods to remove a specific component for example, the Wheel Bearing and match it again efficiently.
Gilera GP 800 Workshop Manuals will provide you with targeted diagnostic information for the vehicle so if something is faulty it will help you understand what the issue is and methods to correct it. Then you are able to analyse if you can do this on your own or if ever the job is just too big you can still book your GP 800 into a local garage.
Gilera GP 800 manual