My bike's engine doesn't slow back down to idle speed fast enough when I release the throttle, especially when the engine heats up past the second line on the engine temp gauge. would any one know what I'm talking about, what the problem is, & how I or a technician can do to solve this problem...

hi. the only way i can get my 2004 vulcan to start. both when its cold and when its hot, is to turn the idle screw way down. ive put new plugs in and ive relocated the R/R. i do have drag pipes now but it was doing this when i had the stock exhaust too. im going to try seafoam tomorrow. ive...