If you want to execute adjustments to your MV Agusta 350 Scrambler then it is usually recommended to have a Workshop Manual for a reference in the event that you want to know proven methods to strip off a particular part such as the Gearbox and install it again perfectly.
MV Agusta 350 Scrambler Workshop Manuals provides exact diagnostic info for the car therefore if something is faulty it helps you figure out what the issue is and the best way to make it better. You will be able to evaluate if this can be done by yourself or in the event the job is too big you can actually make a booking for your 350 Scrambler into a nearby mechanic.
MV Agusta 350 Scrambler manual