I started having a problem recently. I'm not sure when it started but here it is.
When I start the bike and it's cold, everything is fine. A little choke and then a minute or two and the bike idles fine (though a little high). When the bike gets good and warmed up, I get pretty high rpm's (2500-3000) at idle unless I slow it down with high gear at slower speed right before I stop.
I had the carb off a couple of months ago, but everything seemed to be fine until recently. The carb is not shimmed and the screw is out about 1 3/4 turns.
Is the deceleration diaphram not seated maybe? I think the choke is adjusted okay but not positive?