Yamaha XT660R Workshop Manuals
If you want to execute repairs to your Yamaha XT660R then it is usually a good idea to have a Workshop Manual for reference in case that you need to know ways to take out a particular part much like the Wheel and fit it again correctly.
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Yamaha XT660R Workshop Manuals will provide you with distinct diagnostic guides for the bike therefore if something is not working it will help you find out what the issue is and the way to fix it. After that you can assess if this can be done yourself or in the event the job is too big you could make a booking for your XT660R in to a local mechanic.