Quiet the stock exhaust ?

I recently moved to West Palm Beach , Florida .... BIGGEST MISTAKE Anyways Me and my brother both have motorized bikes and coming home a few days ago around 4:15pm still daylight a cop pulled me over ... I was told if my motor can be heard its bad to have


We both have a stock exhaust on our 66c-80cc Motors to avoid the Police is there any other QUIET exhaust or is there a way to silence the stock exhaust

Thanks TIM