If you want to carry out maintenance for your Cagiva Navigator then it will always be a good plan to have access to a Workshop Manual to keep just for personal reference just in case you need to know tips on how to strip off a certain component for instance the Clutch and install it again accordingly.
Cagiva Navigator Workshop Manuals are able to offer certain diagnostic facts for your car or truck so if something is wrong it helps you determine what the situation is and the best way to repair it. You can then assess if this can be done by yourself or in case the job is too big you could book your Navigator in to a trusted mechanic.
Cagiva Navigator manual