If you choose to undertake maintenance tasks for your Husqvarna 125 WRK then it will always be a good plan to own a Workshop Manual to use as a guide just in case you need to know proven methods to take out a particular component for instance the Wheel Bearing and install it again in the right way.
Husqvarna 125 WRK Workshop Manuals provide you with specific diagnostic info for the car or truck therefore if something is playing up it will help you identify what the issue is and how you can correct it. After that you can evaluate if you can do this yourself or in case the job is too big you are able to make a reservation for your 125 WRK in to a suitable repair garage.
Husqvarna 125 WRK manual