If you want to do fixes on your own Kymco Straight 150 then it is usually recommended to have access to a Workshop Manual to keep just for personal reference if you want to know how to take out a particular part including Wheel Bearing and install it again accurately.
Kymco Straight 150 Workshop Manuals can provide unique diagnostic guidelines with regards to your automobile therefore if something is not working it will help you determine what the problem is and how you can make it better. After that you can analyse if this can be done by yourself or in the event the job is too big you could book your Straight 150 right into a nearby repair garage.
Kymco Straight 150 manual