If you wish to execute repairs on your Sym Joyride 125 then it is always a good plan to possess a Workshop Manual for personal reference in case that you need to know techniques to strip off a certain part like the Wheel Bearing and install it again safely.
Sym Joyride 125 Workshop Manuals are able to offer particular diagnostic info on your vehicle therefore if something is wrong it can help you understand what the issue is and how to correct it. You will be able to decide if this can be done yourself or if the job is simply too big you can actually make a booking for your Joyride 125 in to a decent friendly mechanic.
Sym Joyride 125 manual