If you need to perform fixes on your Honda XR 650 then it is always a good idea to own a Workshop Manual to keep just for a reference in case you need to know tips on how to take out a certain component much like the Gearbox and match it again the right way.
Honda XR 650 Workshop Manuals gives you exact diagnostic guides for the car so if something is broken it helps you discover what the problem is and tips to resolve it. After that you can determine if this can be done yourself or in the event the job is just too big you can actually make a booking for your XR 650 in to a trusted mechanic.
Honda XR 650 manual