Ok I have a 99 YZF400. Iv been through the carb like 4 times cleaning it and cant find anything. Iv tried everything I know. It will start right up with the choke on and idle fine but the second I push the choke in it will die. Sometimes it will idle for a few socond but then die. If I keep snaping the throttle then push in the choke It will stay running fine and I can fly around no problem and do catwalks for ever but if I let off and pull in the clutch it just dies. Iv been messing with it because it pops a little more than I think it should when i let off the throttle like a lean pop but need to get it to Idle. Any ideas would be nice.