If you choose to accomplish fixes on your own Honda SH300i then it is always a great idea to have a Workshop Manual to keep just for personal reference if perhaps you need to know how to strip off a specific component for example the Wheel Bearing and fit it again appropriately.
Honda SH300i Workshop Manuals will provide you with identifiable diagnostic guides on your vehicle so if something is playing up it will help you find out what the issue is and methods to fix it. You can then analyse if this can be achieved on your own or if ever the job is just too big you could make a booking for your SH300i right into a suitable repair garage.
Honda SH300i manual