My 1984 V65 is giving me fits. The carbs have been re jetted, cleaned and put in sync. It runs like a stripped assed ape but with one problem. When I get into it it is crisp and great response, but it won't calm down to an idle for several seconds after I let off the gas. It stays at a hi rpm and will not shut down right away. What do I need to adjust? I know it is in the carbs but I don't know where to look or what to adjust. Can someone HELP?