If you want to undertake fixes for your Suzuki Katana 750 then it is usually recommended to own a Workshop Manual to keep just for reference in case you need to know proven methods to remove a certain part for example the Wheel and install it again properly.
Suzuki Katana 750 Workshop Manuals will give you precise diagnostic information for the vehicle therefore if something is broken it can help you identify what the situation is and some ways to fix it. You can then determine if this can be achieved by yourself or that the job is simply too big you can make a reservation for your Katana 750 right into a local friendly mechanic.
Suzuki Katana 750 manual