2009 450.. It wont run right. I have cleaned the carb, timing is spot on and checked the valves. the tightest valve is the middle intake at.011. the thing constantly runs lean. I replaced the entire hot start cable and plunger. I have dissected the carb like 4 times and blown air and shined a light through every hole in it. the pilot was increased to a 48. The o ring on the fuel screw looks ok and the slide plate is on with the hole on the bottom. I cant figure out why its running so lean. It will die and wont idle and is a pita to start. header gets beat red in 10 seconds when the choke is off. It acts like a carb issue, but I cant think of anything else to check. Any ideas at all will help, seriously even long shot ideas are welcome at this point.