My motor misfires at idle, and eventualy stalls.<br />When the fast idle lever is raised, it chokes a little and then revs out fine. When I put it in gear and try to accelerate it won't pick up for about 30 seconds or more, then it sputters and chokes for a while, then runs fine at all throttle positions until I bring it back to an idle. I have rebuilt the carbs, changed plugs and plug wires, replaced fuel lines, changed the fuel but the problem is still there.<br /><br />Any ideas ???