Hey whats up. I have a buddy that has a 05 1000 RR and he wants to change the stock exhaust. He just wants a slip-on. I told him I would help him I changed my exhaust on my bike which is under seat. He doesnt know shit about bikes which all the people I ride with dont kno anything. He keeps telling me that in order to change the exhaust the gas tank has to be removed. so the question is does it have to be removed or not?? Also is changing the exhaust a hard job to do. My bike took me about an hour to do.