If you choose to do maintenance tasks to your Yamaha TW200 then it is usually recommended to have access to a Workshop Manual for reference should you need to know the right way to strip off a particular component like the Wheel Bearing and install it again adequately.
Yamaha TW200 Workshop Manuals will give specified diagnostic guidelines with regards to your automobile so if something is not working it will help you determine what the situation is and tips to make it better. You will be able to analyse if this can be done by yourself or in the event the job is too big you could make a booking for your TW200 right into a trusted garage.
Yamaha TW200 manual