I'm in the process of getting the M4 street slayer slip-on for my 2012 cbr250r and being this is my first bike i do not know much about it and I don't want to have to empty my wallet for someone to install it. How do I remove the stock muffler without destroying/messing up anything in case i need to reuse it in the future? Ive searched for videos and all but cant find anything...Need some help/advise, step by step instructions or a video please. THANKS!!!