If you choose to do maintenance for your VOR SM E 450 Supermotard then it will always be recommended to possess a Workshop Manual for a guide if you need to know the way to take off a specific part including Gearbox and match it again the right way.
VOR SM E 450 Supermotard Workshop Manuals can offer you specific diagnostic guides for your vehicle so if something is faulty it helps you find out what the issue is and the way to correct it. Then you are able to assess if this can be achieved yourself or in the event the job is simply too big you can still make a booking for your SM E 450 Supermotard into a suitable friendly mechanic.
VOR SM E 450 Supermotard manual