I removed and lovingly cleaned the carb on my 83 QT50. I also replaced the stock air filter with a K&N filter. Since I did these two things it is harder to start cold and bogs on acceleration. I have the idle mixture just a tad rich. I made sure I had the carb all the way on the intake.If I give it a half choke on acceleration it picks right up. Hmmm. Anyone have an idea here?