I have a new 2005 Roadking Custom with Samson ovals for pipes. I never had 150 Km on it and the right side pipe was all blued. When I went to the dealer for my first servicing they changed the pipe. The mechanic told me that it will eventually blue on this side. It looked horrible. Now that I have a new pipe and its really blueing again and I only have 4000 KM on the bike. Is this normal or are these pipes no good.