I have a 2002 Katana that has sat for a good coupleof months. It only has 1200 miles on it and has had all service. I rode it a couple of months ago and all was fine. i charged the battery yesterday and choked it up and it warmed up quickly. The moment I eased it to no choke it puked! I started it and drove it on partial choke and it ran fine. I even rode it with no choke and it was fine until I would let off the gas and then it would die. What could it be?c Weak battery,sticky clutch, gumed jet, or bad plugs?? I just want an opinion as I would really like to sell the bike. Thanks Rich.