If you want to undertake fixes for your Honda XL 350 R then it is usually recommended to have access to a Workshop Manual for personal reference just in case you want to know how you can take off a specific component for example Gearbox and match it again safely.
Honda XL 350 R Workshop Manuals can provide detailed diagnostic details on your vehicle so if something is wrong it helps you determine what the problem is and how you can make it better. Then you are able to evaluate if you can do this yourself or in the event the job is just too big you can make a booking for your XL 350 R into a nearby car garage.
Honda XL 350 R manual