2006 Suzuki Ozark 250 Idle Issue

[Jenkins]

I recently purchased an Ozark 250 and the quad runs great and is in great shape best I can tell. However, there is an intermittent issue with the idle.  After riding for a bit, maybe 20 mins, the idle will go high when shifting to neutral.  If it's in gear, all is good. We reached out to the seller and asked if there were any issues they didn't mention and they said that the idle screw needs to be adjust for the warmer Temps we area heading into. I am far from an engine expert, but this doesn't sound right to me and I feel like a small issue is being dumped on me. Any ideas or where to start looking would be much appreciated. 

[Mech]

It does sound like the sort of thing that could come right with a little adjustment to the idle settings.

An air leak around he manifold could cause it too though.

I'd try adjusting the idle mixture and speed when it's warm first off..

[alexwv1863]

You could also clean the carb and adjust the idle screw like the ones before me suggested.  Make sure you clean and blow out all of the injectors in the carb when cleaning it.  I don't think it would be a hard fix.  I actually have the exact same 4-wheeler that I'm working on

[IrishBrewer]

There is a little white plastic knob to adjust the idle near the base of the carb.