I have a 2004 prairie 360 that runs good, but is hard to start and does not idle correctly. So far i checked the valves and they are in spec. Cleaned the carb multiple times, and went to a #38 pilot. New battery and plugs. When i go to start it, it will just keep cranking and sometimes it will start, but most of the time i have to pull start it. As long as i can remember this quad would never start easily cold or hot. We had it in a couple dealers and they would get it to idle better by adjusting the two screws but still hard to start.