If you want to do auto repairs on your Gilera SMT then it will always be a good plan to have access to a Workshop Manual to keep just for reference in the event that you need to know easy methods to strip off a particular component for example, the Wheel Bearing and match it again in the right way.
Gilera SMT Workshop Manuals offers you targeted diagnostic guidelines on your car so if something is not working it will help you work out what the problem is and some ways to repair it. After that you can evaluate if this can be achieved on your own or in case the job is simply too big you can book your SMT in to a decent car garage.
Gilera SMT manual