If you need to accomplish repairs on your own Italjet JetSet 150 then it is usually a good plan to own a Workshop Manual for reference if you need to know the way to take out a particular component for example Exhaust and install it again in the correct manner.
Italjet JetSet 150 Workshop Manuals provide you with special diagnostic info for your vehicle so if something is wrong it helps you figure out what the problem is and methods to make it better. You can then analyse if this can be done on your own or in case the job is simply too big you can actually book your JetSet 150 in to a suitable car garage.
Italjet JetSet 150 manual