Ct90 exhaust.
 

Hi guys. I’m new here so still trying to work out how all this works.
Ive just purchased a Suzuki Boukevard C90T.
The dealer in South Australia (I’m in Geelong Victoria) tells me the previous owner modified his standard pipes to give more noise and awareness on the road. Not knowing what he has done my concern is that when I go to vicroads to re register the bike it might fail the epa standard of 94 db(a). Is there anything I can do to temporarily dampen the sound?
The pipes are the original still.