If you choose to do maintenance tasks on your own Cagiva Mito SP 525 then it is usually a good idea to have access to a Workshop Manual to use as reference in case that you need to know ways to strip off a specific part including Gearbox and match it again accurately.
Cagiva Mito SP 525 Workshop Manuals will give specific diagnostic information on your vehicle so if something is not working it helps you determine what the issue is and some ways to fix it. After that you can assess if this can be achieved by yourself or if ever the job is too big you can actually make a booking for your Mito SP 525 right into a decent friendly mechanic.
Cagiva Mito SP 525 manual