If you choose to accomplish adjustments on your Gilera NGR 250 then it is always a great idea to have a Workshop Manual to use as personal reference in the event that you want to know techniques to remove a particular part for example Brake Pads and install it again the right way.
Gilera NGR 250 Workshop Manuals provide you with exact diagnostic facts for the car so if something is broken it can help you determine what the problem is and tips on how to correct it. You can then evaluate if this can be done yourself or that the job is simply too big it is possible to book your NGR 250 in with a trusted friendly mechanic.
Gilera NGR 250 manual