I parked my 1997 Arctic Cat ZRT 600/manual start 2 weeks ago after 200 miles of great riding in NH. Drove it into the back of my pickup and headed home. Now, it won't run, even after some starting fluid, it just burns off and immediately stalls. From what I can see & check, the fuel filter is clean and it flows ok. The lines to the carbs from the fuel pump are all full of gas. The line from the filter to the pump, has a 2 inch air bubble in it?? Never had this problem before. Also, when I drive back home with the machine in the truck, I DID shut the fuel line off first. Do I have a vent problem somewhere or a fuel pump problem or what?????? I'm stumped and PO'd. Any help is greatly appreciated!!!!