If you choose to do maintenance to your Yamaha TY 50 then it is usually a good idea to own a Workshop Manual to use as personal reference just in case you need to know how you can take out a specific part for example Gearbox and install it again properly.
Yamaha TY 50 Workshop Manuals are able to offer precise diagnostic details for your automobile so if something is wrong it helps you identify what the issue is and methods to resolve it. Then you are able to determine if you can do this on your own or that the job is just too big you can still book your TY 50 in with a local car garage.
Yamaha TY 50 manual