If you need to accomplish fixes to your Beta REV 4T then it will always be a good plan to have a Workshop Manual to use as reference in the event you want to know proven methods to take off a particular component such as the Exhaust and install it again successfully.
Beta REV 4T Workshop Manuals provides certain diagnostic wisdom with regards to your automobile so if something is broken it will help you discover what the problem is and how you can repair it. After that you can assess if this can be achieved yourself or in case the job is just too big it is possible to make a reservation for your REV 4T in with a decent mechanic.
Beta REV 4T manual