If you wish to conduct maintenance on your Yamaha FZ 750 then it is usually a great idea to possess a Workshop Manual to use as reference if perhaps you need to know tips to take out a certain component including Wheel Bearing and match it again accordingly.
Yamaha FZ 750 Workshop Manuals will give you particular diagnostic information for your vehicle therefore if something is not working it will help you identify what the situation is and some ways to resolve it. After that you can evaluate if you can do this on your own or if the job is too big you can book your FZ 750 into a trusted repair garage.
Yamaha FZ 750 manual