If you have to carry out maintenance tasks on your Suzuki Katana R50 then it is usually a good plan to have a Workshop Manual for a guide in the event that you want to know how you can take off a certain part much like the Gearbox and match it again efficiently.
Suzuki Katana R50 Workshop Manuals will give targeted diagnostic guides with regards to your car so if something is not working it helps you understand what the issue is and easy methods to make it better. You can then assess if this can be done on your own or if the job is too big you could make a reservation for your Katana R50 in with a local garage.
Suzuki Katana R50 manual