Just completed a nine-month restore on my 82A, and took it for its first hour-long run up to Athens tonight. Runs like an absolute dream at highway speeds, has loads of power off the line, a superb rebuild if I do say so myself. The problem comes in the idle speed. When stopping at a light after running at highway speeds (down shifting as I slow down), the engine speed won't get below 3k, even with no throttle. When I lightly push down on the sync-adjustment screw on carb 4, it immediately drops to correct idle speed. However, it slowly creeps back up and would approach 3k if I let it. Push down lightly on the sync screw again, and it drops to correct speed. Repeat as necessary. Any thoughts or suggestions would be greatly appreciated. Thx.