If you have to carry out auto repairs on your own Yamaha YZF R7 then it will always be recommended to own a Workshop Manual to use as personal reference should you need to know proven methods to take out a particular part for example, the Exhaust and match it again accordingly.
Yamaha YZF R7 Workshop Manuals gives you precise diagnostic details for the car therefore if something is faulty it will help you find out what the problem is and the best way to repair it. You will be able to assess if this can be achieved yourself or in case the job is simply too big you could make a reservation for your YZF R7 in with a trusted garage.
Yamaha YZF R7 manual