If you need to perform maintenance tasks for your Beta Ark 50 AC then it is usually a good idea to own a Workshop Manual to use as a reference just in case you need to know methods to strip off a specific part much like the Exhaust and fit it again the right way.
Beta Ark 50 AC Workshop Manuals will provide you with specified diagnostic guides with regards to your automobile so if something is faulty it will help you identify what the situation is and some ways to make it better. You will be able to decide if this can be done on your own or in case the job is just too big you can still make a booking for your Ark 50 AC in to a nearby garage.
Beta Ark 50 AC manual