I just picked up an 83 200e Big Red ATC on a trade. Starts easily and runs pretty good, but needs the choke on and idles very fast. I took the carb apart and cleaned it real good - there's not much to them. It's a little better, but still not right. I can run it without the choke, but it tends to miss some and race and idle, race and idle. I've had small engine carbs in the past that I could just not get working. Before I buy a new one I want to make sure I'm not missing something. I'm new to these engines. Anything else that could cause the engine to idle poorly and race like that? Anybody know a good source for a carburator?