I have 2000 flstc that is leaking fuel from the stock vacuum petcock. It only seems to do it when I first start it or turn it off. I took it apart and inspected it but found no obvious problems. And it doesn't seem to do it all the time. Also there is a small hole machined in the final cover, does it go up or down when installed? I think it may be an air hole but I am not sure. Thank in advance.