I have a 07 hdegc had since new,this is my 1st post here so bear with me guys.I am having an issue with low idle speed that seems to be getting worse over time.I have searched various threads and still at a loss.Bike has 36k miles the only upgrades to bike are a big sucker breather and added a Dobeck TFI over yr ago.The low idle speed issue used to only happen on real hot days from day one. Dealer had a ecm upgrade recall which I had done @ 10000 mile range. This only helped with a knocking sound under load. I have new fuel supply line and filter in tank,last 8000 miles.My plugs don't show any indication of lean or rich.I have changed them a few times always factory original.I am wondering if I may have issue with the cylinder temp. sensor the bike runs fine initially After I have been at speed and riding short time,when I come to stop idle can run down as low as 700. I can throttle up to 1000 no problem while stopped, if I hold there a while bike will eventually idle on its own ok.I also can shut bike off for a min., then restart, Idles fine. I have seen threads before about the rear cylinder shutting down for cooling engine when hot, I am unable to find anything in previous threads to help.any input appreciated.I am also planning on putting new battery on bike as this is original 5.5 yrs old and now notice voltage drop to 12 if idle below 1000 rpm.