If you need to conduct maintenance on your own Yamaha TT 225 then it will always be recommended to own a Workshop Manual to use as a reference just in case you need to know the way to strip off a particular part like the Wheel Bearing and fit it again accurately.
Yamaha TT 225 Workshop Manuals offer you detailed diagnostic details with regards to your car or truck so if something is not working it helps you discover what the issue is and the way to repair it. Then you are able to assess if this can be done yourself or if the job is too big it is possible to make a reservation for your TT 225 in with a suitable friendly mechanic.
Yamaha TT 225 manual