If you have to do repairs for your Gilera Stalker 50 then it is usually a good idea to have a Workshop Manual to use as a reference in the event that you want to know how to take off a specific component for example Brake Discs and fit it again in the correct way.
Gilera Stalker 50 Workshop Manuals will provide you with specific diagnostic information for your car or truck so if something is faulty it helps you identify what the situation is and how to resolve it. After that you can analyse if you can do this yourself or in case the job is too big you can make a reservation for your Stalker 50 right into a decent mechanic.
Gilera Stalker 50 manual