I was considering buying a slip-on exhaust for my k7gixer750. My question is about the cat-converter. Some aftermarket systems bypass having a cat altogether (Akropovic shorty and the M4 slipons) whereas the yoshi r55 has one. I vaguely remember a conversation about removing cats from cars but if caught there was a huge fine. Would this also be the case for bikes? I'm aware that I could get done for noise pollution. Most aftermarket systems are not legal.