Hello together! I bought a used SMC 660 BJ 2004 with 1900km on Saturday! On the machine is an Akrapovic rear silencer mounted, the previous owner did not have it registered, and also has no papers of it! Whether on the ESD a test number is punched in he spontaneously could not say on the phone yesterday! Therefore my question knows someone whether there are for the ESD papers or whether it is an ESD which is actually only used in the “Racing area”? Pictures come on weekends e or at the beginning of the week when I picked up the machine! here is a picture of the Akrapovic PS: The rear silencer has a removable DB killer Gruss Martin