If you want to conduct maintenance tasks on your own Yamaha FZ 750 then it will always be recommended to have a Workshop Manual to keep just for a reference if you need to know how you can remove a particular component for example, the Exhaust and match it again safely.
Yamaha FZ 750 Workshop Manuals provide you with specific diagnostic guides with regards to your automobile therefore if something is playing up it can help you ascertain what the problem is and some ways to repair it. You can then evaluate if you can do this on your own or in case the job is simply too big you could make a reservation for your FZ 750 right into a nearby car garage.
Yamaha FZ 750 manual