Hey guys newbie on this forum but mechanic of 15 yrs pulling my hair out on this 80' xs400 special II. So I dunked the carbs 3 times and even used my agitation device with it for extra cleaning. Bike runs awesome bottom end top and everything except I get a high idle after warm up......but......... if I slightly push down on the left carb it idles down to normal. Before we state the obvious yes the carb boots to engine are brand new with new gaskets and yes I even bumped down the float level incase that may have been my issue. I have sprayed them down with wd 40, brake cleaner, and even water while running g and no change. Please any input is appreciated thanks