it is a triple carb 650 have re adjusted needle valve to factory specs cant find anything about fuel/air (idle) screw except one person saying one full turn out from snug would like to hear more and make sure this is right, also says idle should be from 1500-1900rpm clutch engages at 3300-3800rpm then once engaged should drop to 2000 ish is any of this correct? she idles high dont seem right