The image is an XS650 vacuum petcock. I am not sure of the year of the bike, but no later than 1981 and no earlier than 1978. My best guess it’s an ‘81. If you need exact, send me email or PM. I’ll find out for you. BTW, I put a K&L kit in my XS11 shutoff valve and have the same issue. Timbox, the octopus is a safety device. There's a tipover switch to kill the ignition, then the vacuum shutoff kills the fuel. It's supposed to keep you from being on the ground and on fire.