I've had to replace the line that comes off the petcock due to a tear in the rubber with ensuing gas leak; too much stretching when I was lifting the tank to do carb synchronization. I voluntarily replaced the rest later because I wasn't entirely satisfied with how the dealership routed the fuel lines when they did the CRS installation. I used fuel injection line from an Advance Auto Parts, which is a bit thicker and harder to work with than the stock stuff, but it also seems alot more durable.
