O.k. Here's the deal. I Have a full muzzy exhaust a K&N I've jetted the carbs, raised the needle's, adjusted the mixture, and adjusted the floats. Bike runs like a scalded dog. Problem is after about 3-4 months now it wants to idle at about 1800 RPM's. Obviously first thought is intake leak. Can't find one I'v sprayed around the intake boots, around the mixture screws, checked hoses with wd-40. Nothing. I then preceeded to clean carbs, resync, cneck compression, check valve clearance. I canturn the idle screw all the way of the linkage doesn't matter. The only wayI can slow it down is to turn the mixture screws almost all the way closed. Some insight would be greatly appreciated