If you wish to conduct fixes to your Yamaha YZ85 then it is always a good idea to have access to a Workshop Manual to keep just for reference should you need to know ways to remove a particular component such as the Exhaust and fit it again in the correct way.
Yamaha YZ85 Workshop Manuals provides specific diagnostic guides on your automobile so if something is not working it helps you understand what the problem is and easy methods to repair it. Then you are able to decide if this can be achieved on your own or in case the job is too big it is possible to book your YZ85 right into a decent mechanic.
Yamaha YZ85 manual