If you wish to do maintenance for your Honda VF 750 S then it will always be a great idea to possess a Workshop Manual for reference just in case you want to know ways to take out a certain part including Gearbox and match it again in the correct manner.
Honda VF 750 S Workshop Manuals gives you specific diagnostic details for your car so if something is wrong it helps you determine what the situation is and how to resolve it. After that you can evaluate if you can do this by yourself or that the job is too big you could book your VF 750 S into a decent friendly mechanic.
Honda VF 750 S manual