Thank you, I kinda suspect that but wanted to check with the experts. Next question. This is a '98 with under 11k miles that I bought 2 months ago. This is my first Vulcan so there is a bit of a learning curve. This is my problem, it starts easily idles smoothly, but between 1500 and 2600 it gets rough with both cylinders stumbling. Above 2600 it smooths out with just the occasional miss. It also pops off badly in decel. I replaced the plugs and adjusted the pilot air vavle with just small success. The plugs show a slight lean condition. For the popping I marbled the engine which took care of that problem. For the stumbling I started looking at the carbs. I drained both carbs several times, each time finding some small black flakes. I tried shooting gumout up the carb drain, no help, still getting a few flakes. Pulled the tank and flushed it. The tank is clean, no rust (someone had sloshed the tank with some sort of tan sealant). Both shutoff valve pick up screens are clean and intact. This is where I might have screwed up, just before I installed the tank I filled the fuel lines to the carb with gumout. The engine started, smoothed out in idle then quit. It now will not start. Verified fuel is getting to the carbs. So what did I screw up and short of pulling the carbs and overhauling them how do I fix it? Thanks.